8. Most plants open their stomata during the day when light is available for photosynthesis to favor CO2 diffusion and then close them at night to conserve water. However, plants such as the saguaro cactus (pictured) actually open their stomata at night to fix carbon and undergo alternative photosynthetic reactions during the day instead of capturing sunlight for lightdependent reactions. This is an adaptation to conserve water in desert climates. With this in mind... a. Do you think the air and soil surrounding the cactus is typically drier or wetter than the plant? b. How would soil moisture impact water transport in the plant? c. Why do you think cacti lack large green leaves found in plants that undergo more traditional forms of photosynthesis?
Answers
The air and soil surrounding the cactus are typically drier than the plant.
Desert environments have low humidity levels and limited water availability, which leads to arid conditions. Soil moisture impacts water transport in the plant by influencing its ability to absorb water from the soil. Cacti have specialized adaptations to enhance water uptake, such as long root systems and highly efficient water-absorbing tissues. In periods of low soil moisture, cacti can reduce water loss by closing their stomata and minimizing transpiration.
Cacti lack large green leaves found in plants undergoing traditional photosynthesis to reduce water loss through transpiration. The leaves of cacti have evolved into spines or modified into small structures called cladodes, which minimize surface area and reduce water loss. This adaptation helps cacti conserve water and survive in arid environments where water availability is limited.
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Related Questions
Match Column A with Column B
Column A
3.1.1 Division of the cytoplasm
3.1.2 Uncontrolled cell growth
3.1.3 Chromatids lined up at equator of cell
3.1.4 Chromatids joined at this point
3.1.5 Mass of cancerous cells
3.1.6 Skin cancer
3.1.7 Growth and mitosis
3.1.8 Cancer causing factors
3.1.9 Cancer cells that do not spread
3.1.10 Replicated half of a chromosome
Column B
A carcinoma
B benign
C cancer
D meristematic
E carcinogens
F metaphase
G cytokinesis
H tumour
I centromere
J sarcoma
K anaphase
L malignant
M chromatid
N cell cycle
Answers
Answer:
3.1.1 Division of the cytoplasm - Cytokinesis
3.1.2 Uncontrolled cell growth - Cancer
3.1.3 Chromatids lined up at equator of cell - Metaphase
3.1.4 Chromatids joined at this point - Centromere
3.1.5 Mass of cancerous cells - Tumor
3.1.6 Skin cancer - Carcinoma
3.1.7 Growth and mitosis - Meristematic
3.1.8 Cancer causing factors - Carcinogens
3.1.9 Cancer cells that do not spread - Benign
3.1.10 Replicated half of a chromosome - Chromatid
Explanation:
The division of the cytoplasm is known as Cytokinesis. It occurs during the later part of the division of the nucleus in both mitosis and meiosis. In Cytokinesis, the cytoplasm of a single parent cell divides in two to produce two daughter cells.
Cancer is a disease condition that results when the growth and division of cells is uncontrolled. It occurs as a result of changes to the DNA either due to environmental factors or heredity factors.
Metaphase is one of the four stages in mitosis. During mitosis, the chromatids which are joined at the centelomere line up at the middle or equator of the cell.
Centromere is a region in the chromosome in which sister chromatids are joined together to form a short and a long arm of the chromosome.
A tumour is a swelling of a part of the body due to the abnormal growth of cells in that part of the body. A tumour may have the ability to spread or not.
Cancers that originate in the skin or tissues lining organs is known as carcinomas.
In plants, meristematic tissues are responsible for growth as they consist of actively dividing or mitotic cells. Meristematic cells are present at the tips of roots,stem and branches.
Carcinogens are agents or factors that are able to cause cancers. They include such agents like chemicals, electromagnetic radiations, some viruses, lifestyle factors, etc.
Benign tumours refers to growths in tissues or organs of the body which are non-cancerous as they do not spread to other tissues or organs in the body.
A chromatid is one-half of a replicated chromosome present in the nucleus of the cell. Two chromatids are joined together at the centromere to form the chromosome.
In the expression 2(10x) + 15y, x represents the number of hours Nina works in a week at her first job and y represents the number of hours she works in a week at her second job. The expression shows how much money Nina has earned this week. Which statement is true?
Nina has worked a total of x – y hours so far this week.
Nina works 15 hours a week at her first job.
Nina makes 20x dollars at her first job each week.
Nina makes $10 per hour at her second job each week.
Answers
Answer:
C. Nina makes 20x dollars at her first job each week.
Explanation:
all of the organisms, along with the associated physical and chemical environment, in a specific area is called a(n)
Answers
The term you are looking for is an "ecosystem." An ecosystem refers to a biological community of interacting organisms (including plants, animals, microorganisms) in conjunction with their physical and chemical environment.
It encompasses both the living organisms and the abiotic (non-living) factors such as soil, water, air, climate, and nutrients that influence and sustain life within a particular area or habitat. Ecosystems can range in size and complexity, from small-scale habitats like a pond or a forest to large-scale ecosystems like a coral reef or a grassland.The term you are looking for is "ecosystem." An ecosystem refers to a community of living organisms, including plants, animals, microorganisms, and their physical and chemical environment, all interacting as a system within a specific area or habitat.
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Biodiversity in a particular ecosystem
A. is the total number of species in that ecosystem
B. includes the variability of the individual genes
C. impacts the function of the ecosystem in which the species live
D. All of the choices are correct.
Answers
Biodiversity in a particular ecosystem : D.) All of the choices are correct. The term biodiversity refers to the degree of variability of living organisms in a particular ecosystem. Hence, option D) is the correct answer.
It includes the total number of species in the ecosystem and the variability of the individual genes, as well as the influence of the ecosystem on the species. The function of the ecosystem, as well as the species that inhabit it, are affected by biodiversity.
The more diverse an ecosystem is, the more resilient it is to environmental changes and disturbances. It also plays a crucial role in the ecosystem's functioning by influencing nutrient cycling, soil formation, and water purification.
Therefore, the correct answer is option D, that all of the choices are correct. Biodiversity is a term used to describe the variety of living things in a particular ecosystem. It refers to the range of species in a region and the genetic variation that exists within and between them. The complexity of an ecosystem is determined by its biodiversity.
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Who first used the word “atomos” to describe the smallest unit of a substance?
Answers
Answer:
Democritus
Explanation:
Democritus was a Greek philosopher and is still remembered for his contribution towards the atomic structure of the universe. He first described the smallest unit of a substance and named it as "atomos".
Answer:
Democritus is correct
Explanation:
What would happen if a virus stayed in the lysogenic cycle forever and was NEVER triggered to go into the lytic cycle?
Answers
Answer: During lysogeny, the prophage will persist in the host chromosome until induction, which results in the excision of the viral genome from the host chromosome.
Explanation:
hope this helps!
What is "the balance of nature"?
Answers
The balance of nature is a theory that proposes that ecological systems are usually in a stable equilibrium or homeostasis, which is to say that a small change (the size of a particular population, is one example) will be corrected by some negative feedback that will bring the parameter back to its original "point of balance" with the rest of the system.
Most inspired particles such as dust fail to reach the lungs because of the ________.
Answers
Answer:
Most inspired particles such as dust fail to reach the lungs because of the ciliated mucous membrane of the upper respiratory tract.
Explanation:
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Cilia, which resemble hair-like projections, border the bronchi in the lungs and transport bacteria and detritus up and out of the airways. Goblet cells, which secrete mucus to protect the lining of the bronchus and trap germs, are dispersed throughout the cilia.
What dust fail to reach the lungs?Specialized cells known as macrophages target dust that enters the sacs and lower portions of the airways without cilia. These play a critical role in the lungs' protection. The air sacs are kept clean by them. Virtually swallowing the particles are macrophages.
Most of the dust particles are captured by the mucus they create. The mucus is moved upward and out into the throat by tiny hairs called cilia that coat the walls of the air tubes. There, it is either swallowed whole or coughed up and vomited out.
Therefore, Most inspired particles such as dust fail to reach the lungs because of the ciliated mucous membrane of the upper respiratory tract.
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during a controlled experiment if you purposely change the temperature to test a hypothesis the temperature is
A: independent variable
B: responding variable
C: experimental variable
D: dependent variable
Answers
Answer: A-independent variable
Explanation:
An experiment starts and finishes with the factors that change during the experiment. These are the variables. The experimenter will purposely change one of the variables; this is the independent variable or manipulated variable.
Compare the speed, specificity, types of signals, and duration of action in neural and endocrine reflexes. How is stimulus intensity coded in each type of reflex
Answers
The body reacts to stimuli in two basic ways: through neural and endocrine responses. A comparison of their speed, specificity, signal kinds, length of action, and coding of stimulus intensity is shown below:
Speed: Neural reflexes are distinguished by their quick speed of reaction. In general, endocrine reflexes have a slower reaction time.
Specificity: Neural reflexes frequently function in a more precise manner. The consequences of endocrine reflexes are frequently more pervasive.
Signal Types: Electrical signals (action potentials) sent by neurons are largely involved in neural responses. Hormonal chemical signals are the basis for endocrine reflexes.
Action Time: Neural reflexes normally take only a brief amount of time to complete. Endocrine responses frequently take longer to take effect.
Coding for Stimulus Intensity: In neurological reflexes, there are several techniques for encoding the frequency of action potentials. The quantity of hormone released into the bloodstream often serves as an indicator of the stimulus strength in endocrine responses.
Thus, rapid speed, specificity, reliance on electrical impulses, and relatively brief duration of action are characteristics of neural reflexes.
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in humans (2n=46), how many chromosomes are present in each cell? a) first polar body, b) primary spermatocyte, c) secondary oocyte, and d) spermatid?
Answers
a) First polar body: 23 chromosomes
b) Primary spermatocyte: 23 chromosomes
c) Secondary oocyte: 23 chromosomes
d) Spermatid: 23 chromosomes
Humans have 46 chromosomes in total, 23 from each parent. During the process of gametogenesis, the production of sperm and egg cells, the chromosomes undergo reduction division which results in a halving of the chromosome number.
a) First polar body: During oogenesis, the first meiotic division results in the formation of a secondary oocyte and the first polar body. The first polar body has 23 chromosomes, half the number of chromosomes found in a regular body cell.
b) Primary spermatocyte: During spermatogenesis, the first meiotic division results in the formation of primary spermatocytes. Primary spermatocytes have 23 chromosomes, half the number of chromosomes found in a regular body cell.
c) Secondary oocyte: During oogenesis, the second meiotic division is suspended until fertilization by sperm. The secondary oocyte has 23 chromosomes, half the number of chromosomes found in a regular body cell.
d) Spermatid: Spermatids are the cells that result from the second meiotic division of primary spermatocytes. Like the primary spermatocytes, spermatids have 23 chromosomes.
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What is a reasonable explanation for the phenotypic differences between your skin cells and your nerve cells?
Answers
The sum of an organism's observable characteristics is their phenotype. A key difference between phenotype and genotype is that, whilst genotype is inherited from an organism's parents, the phenotype is not.
There are few difference between skin cells and your nerve cells:
The nerve cell represents the fundamental building block of communication in the neurological system (neuron)Keratinocytes, melanocytes, as well as Langerhans cells, are some of the additional cell types found in the epidermis.The fact that skin cells as well as nerve cells use their genes differently despite sharing the same genes is a viable reason for the behavioral variations between them.
Because they employ the very same group of genes in various ways, these cells differ from one another. For example neurons differ from other cells in the body because: Dendrites as well as axons are specialized cell components found in neurons. Axons transport information out from the cell body, whereas dendrites deliver electrical impulses to the cell body. Electrochemical exchanges between neurons allow for communication.To Know more about phenotype here
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cancer and the flu are both disease of people. what is it meant by the term disease?
Answers
Answer:
The correct answer would be - a condition that is not similar to the normal physiological function of a healthy body.
Explanation:
The disease is the condition where the deviation from the normal physiological function of an organism's body. It is associated with any abnormality in the structural or functional condition of the body.
For instance cancer, the body leaves its normal function of killing cells that are not following the norms and cause uncontrolled cell division
In which situation could a mutation be passed on to the offspring in an
organism?
A. Ultraviolet radiation causes skin cells to undergo uncontrolled cell
division.
B. The DNA of a human lung cell undergoes random breakage.
C. A primary sex cell in a human forms a gamete that contains 24
chromosomes.
D. A cell in the stomach lining of a human undergoes a chromosomal
alteration.
Answers
Answer:
C. A primary sex cell in a human forms a gamete that contains 24
chromosomes.
Explanation:
The gametes are the cells that form offspring.
Which of the following phrases describe the function of the digestive system?
l. Smooth, muscular tube connects the mouth to the stomach
ll. Muscular action in the esophagus pushed food to the stomach
lll. Structures called the microvilli to increase the surface area of the intestines
lV. Nutrients are made available to the body's cells
A. l and ll
B. ll and lll
C. ll and lV
D. lll and lV
Answers
how much of the sun's energy is Absorbed by earth
Answers
the answer is C 51 percent
Which of the following statements is true regarding active transport?
It uses some of its own energy
Which two of the following are examples of passive transport?
Osmosis & diffusion
Which two of the following are examples of active transport?
Exocytosis & Endocytosis
Which of the following is the primary component that makes up the cell membrane?
Phospholipids
Which of the following statements is correct?
Active transport requires cellular energy, but passive transport does not.
Which two substances are most likely to cross a cells phospholipid bilateral by simple diffusion?
Carbon dioxide & oxygen
Which of the following accurately describes dynamic equilibrium?
Molecules move into a cell at the same rate as molecules move out of the cell.
Which of the following describes the difference between simple diffusion and facilitated diffusion though cellular membrane?
Simple diffusion moves particles through the phospholipid bilayer of a cell membrane, but facilitated diffusion moves particles through transport proteins.
Based on your knowledge of osmosis, which statement best describes osmosis is correctly?
Osmosis move only water across the cell membrane without using cellular energy.
Osmosis always involves the movement of what?
Water molecules
Which of the following distinguishes active transport from passive transport?
The use of energy
When does diffusion occur across a cell membrane?
When the concentration of particles is different on each side of the membrane
Which of the following is a requirement for diffusion to take place?
A concentration gradient
Which two of the following processes require energy?
Exocytosis & endocytosis
Which of the following is the cell organelle most responsible for maintaining cellular homeostasis?
Cell membrane
What is the diffusion of water across a selectivity permeable membrane called?
Osmosis
Answers
Cellular energy is required during active transport.
Active transport in cellular biology refers to the movement of molecules or ions across a cell membrane against the concentration gradient from a location of lower concentration to a region of higher concentration. Cellular energy is needed for active transport in order to achieve this movement.
Ion pumps, exocytosis, and endocytosis are the three primary active transport mechanisms.
Active transport : Moving ions or molecules across a cell membrane in the opposite direction of diffusion, i.e., from a region of lower concentration to one of greater concentration. A particular class of protein known as a carrier protein, which uses ATP for Cellular energy, is required for active transport.
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What are the 8 Essential Life Functions?
Answers
Answer:
Repiration, Regulation,Reproduction,Excretion,Growth,Nutrition,Transport,
Explanation:
What occurs when an axon is not conducting a nerve impulse and there is more sodium
outside the axon and more potassium inside the axon?
Select one:
O a. An action potential
O b. An autonomic potential
c. A resting potential
O d. A somatic potential
Oe. A threshold potential
Answers
When an axon is not transmitting a nerve impulse, more sodium is present outside and more potassium is present inside the axon, which results in the resting potential.
What is axon?A nerve cell, or neuron, projects a long, thin portion called an axon that carries electrical impulses away from the neuron's cell body. It is in charge of relaying data from one neuron to the next, whether it be to a muscle cell or another neuron. The action potentials, which are electrical impulses that flow along the axon, enable quick and effective communication between neurons and other cells in the body.
At this point, the electrical potential of the axon differs because its inside is negatively charged relative to its exterior. The selective permeability of the cell membrane to ions and the action of ion pumps maintain this electrical potential. When a change in the membrane potential surpasses a certain threshold, the resting potential serves as a baseline from which an action potential can be started.
When the threshold is crossed, voltage-gated ion channels open, allowing positively charged ions to quickly and briefly enter the membrane and depolarizing it, resulting in an action potential.
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pizza! beer! sex! our motivation or drive for such things is based on the activity of the brain region known as the
Answers
the "Limbic system."The limbic system is responsible for regulating emotions, memory, and motivation. It is a complex set of brain structures that are located on the top of the brainstem and under the cerebral cortex.
The limbic system plays a critical role in human behavior, including our motivation and drive for things like pizza, beer, and sex.Pizza, beer, and sex are all pleasurable experiences that activate the reward system in the brain. The reward system is part of the limbic system and is responsible for generating feelings of pleasure and happiness when we engage in certain activities.
the reward system is activated, and we experience a sense of satisfaction and pleasure. Similarly, when we engage in sexual activity, the reward system is also activated, and we experience feelings of pleasure and intimacy.The limbic system plays a crucial role in regulating our behavior and emotions, and it is an essential part of what makes us human. Without the limbic system,
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Which is calcium dependent? GAP JunctionDesmosome (Maculae adherens)Adherens Junction (Zonulae adherens)Tight Junction (Zonulae occludens)
Answers
Adherens Junctions are calcium dependent junction.
The correct option is (C) Adherens Junction
Adherens junctions: What are they?Cell-cell adhesion complexes known as adherens junctions (AJs) allow cells within a tissue to respond to pressures, biochemical cues, and structural changes in their surroundings. AJs are constantly created and destroyed. Over a set of specified processes, such as initiation, cadherin recruitment, and the recruitment of plaque proteins, the creation and operation of the adherens junction may be explained. As migratory cells first come into contact with one another to create a tissue, for example, adherens junction assembly takes place. It can also happen in pre-existing tissues when cells divide, alter shape, or move in response to pharmacological or mechanical stimuli.Learn more about the Adherens junctions with the help of the given link:
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Growing food in ways which minimize water and fertilizer use and protect biodiversity while enhancing farmers' livelihoods is an example of: Sustainable sourcing Global sourcing Sole sourcing Ethical sourcing
Answers
Growing food in ways which minimize water and fertilizer use and protect biodiversity while enhancing farmers' livelihoods is an example of sustainable sourcing.
Sustainable sourcing is the practice of procuring goods and services in a manner that preserves and improves the natural environment, social welfare, and economic well-being of current and future generations. The process of sustainable sourcing ensures that the procurement of products and services is completed in a way that minimizes any negative impact on the environment.
Additionally, sustainable sourcing also seeks to support social and economic development and protect the human rights of all parties involved. The use of sustainable sourcing practices is vital for addressing some of the most pressing environmental and social challenges facing the world today, including deforestation, greenhouse gas emissions, and water scarcity. It is also crucial for ensuring the availability of resources for future generations.
Therefore, sustainable sourcing is a critical component of many companies' corporate social responsibility (CSR) programs.
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Which compound is produced during carbon fixation? PGA G3P RuBP C6H12O6
Answers
Answer:
A.) PGA
Explanation:
A scientist is comparing the dna sequences of three different organisms. which evidence would support the conclusion that all three organisms are closely related?
Answers
If a scientist is comparing the DNA sequences of three different organisms and wants to conclude that all three organisms are closely related, they would look for evidence of similarity in their DNA sequences
They would specifically search for the following proof:
High degree of sequence similarity: If there is a great deal of similarity between the DNA sequences of the three organisms, this may indicate that they are closely related and had a common ancestor.
Shared genetic characteristics: The existence of particular genes or genetic markers in all three creatures shows that they are closely related and descended from a single species.
Genes or sequences that are conserved: If the three creatures contain genes or sequences that are conserved, it is likely that they have a common evolutionary history and are related.
Geographical distribution: If all three organisms are present in the same area, this is indicative of their close kinship and same ancestry.
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What is the volume of a cube with a side length of 3 centimeters?(1 point)
Answers
Considering the definition of volume, the volume of a cube with a side length of 3 centimeters is 3 cm³.
VolumeVolume is a measure of the space occupied by an object in three-dimensional space.
In other words, volume of a geometric figure is defined as the amount of space occupied by the object or figure in three-dimensional space. Volume is measured in cubic units.
The volume of a cube is equal to the measure of its side to the cube. That is to say:
Volume = side x side x side = side³
This caseIn this case, you have a cube with a side length of 3 centimeters. Replacing in the definition of volume:
Volume= 3 centimeters× 3 centimeters× 3 centimeters
Solving:
Volume= 3 cm³
Finally, the volume of a cube with a side length of 3 centimeters is 3 cm³.
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can some one plz help me on this question its hard :( ill give brainliest
Answers
what types of molecules can easily pass through the membrane?
Answers
How is a cell specialized?
Answers
Answer:
Most cells share features such as having a nucleus, a cell membrane, cytoplasm and mitochondria. Each type of cell has its own job to do. These cells have special features that allow them to perform their functions effectively.
Explanation:
give brainliest please x
DNA replication is an important part of cellular division because correct replication-
Answers
Answer:
Replicating DNA is fragile, and can break during the duplication process. In fact, broken chromosomes are often the source of DNA rearrangements and can change the genetic program of a cell. These changes can trigger a growth advantage in a single cell in your body, and when that cell continues to divide, tumors arise. Fortunately, our cells have defense mechanisms to shield us from these damaging events.
According to the cell theory, which statement is correct?
Answers
Answer:
According to the cell theory all organisms (unicellular or multicellular) are formed of cells. It also states that all cells arise from pre-existing cells by cell division and do not originate spontaneously. Bacteria and other organisms therefore cannot arise spontaneously.
Explanation:
hope this is correct
i feel like its b or a
As per the cell theory, the correct statement is that cell arises from pre-existing cells. The correct option is D.
What is cell theory?Cell theory is a biological theory first proposed in the mid-nineteenth century that states that living organisms are made up of cells, that cells are the basic systemic unit of all life forms, and that all cells originate from pre-existing cells.
The cell theory is significant because it explains the concept of cell and includes the following postulates:
The cell is the basic component of life. All cells develop from pre-existing ones. Cells are the building blocks of all living organisms on Earth.According to the unified cell theory, all living things are made up of one or more cells; the cell is the basic unit of life.
Thus, the correct option is D.
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Your question seems incomplete, the missing options are:
A) Viruses are true cells.
B) Cells are basically unlike in structure.
C) Mitochondria are found only in plant cells.
D) Cells come from preexisting cells.