Answers
hypothesis: a proposition made as a basis for reasoning, without any assumption of its truth.
theory: an idea used to account for a situation or justify a course of action.
principle:a fundamental truth or proposition that serves as the foundation for a system of belief or behavior or for a chain of reasoning.
Related Questions
I need some help with summarizing the following topics: cells and cell processes; photosynthesis and respiration; genetics; evolution; ecology; human body.
Answers
Answer: Read below!
Explanation:
Cells: the smallest structural and functional unit of an organism.
Cell Processes: any process that is carried out at the cellular level, but not necessarily restricted to a single cell.
Photosynthesis: the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.
Respiration: a process in living organisms involving the production of energy.
Genetics: he study of heredity and the variation of inherited characteristics.
Evolution: the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.
Ecology: the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
Human Body: the physical substance of the human organism, composed of living cells and extracellular materials and organized into tissues, organs, and systems.
Please help!!
how does pinocytosis work
Answers
Answer:
Is a mode of endocytosis in which small particles suspended in extracellular fluid are brought into the cell through an invagination of the cell membrane, resulting in a suspension of the particles within a small vesicle
Explanation:
Hope that helps!
The sun is an excellent example of an energy conversion taking place in the solar system. The atoms of hydrogen and helium in the sun fuse together, resulting in
the release large amounts of energy that is transferred to the earth as sunlight. In this example, which of the following best describes the type of potential to kinetic
energy conversion taking place?
a. Nuclear energy is converted to electrical energy
b. Chemical energy is converted sound energy
c. Chemical energy is converted to thermal energy
d. Nuclear energy is converted to radiant energy
Answers
Answer:
d. Nuclear energy is converted to radiant energy
The interior of the phospholipid bilayer is _______ meaning it repels polar molecules, such as water
Answers
The cell membrane's inside is hydrophobic, meaning that water won't cling to it. In order to effectively separate fluid inside the cell from fluid outside the cell, phospholipids form a two-layer cell membrane.
Why do polar molecules repelled by the phospholipid bilayer?Large hydrophilic polar or ionic molecules find it difficult to pass through the phospholipid bilayer. The cell membrane prevents the passage of any size charged atoms or molecules.
What component of the phospholipid bilayer is water-repellent?While the tails (the lipid component) are non-polar, the heads (the phospho part) are polar. The tails, which face the inside of the cell membrane, are "hydrophobic" (fearful of water), whereas the heads, which make up the exterior and inner linings, are "hydrophilic" (lovers of water).
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Why is it that lipids, such as oil, do not readily mix with
water?
A Lipids are nonpolar molecules that are hydrophobic.
B Lipids are polar molecules that are hydrophilic.
C Lipids are nonpolar molecules that are hydrophilic.
D Lipids are polar molecules that are hydrophobic.
Answers
Answer:
Oils and fats not have any polar part and so for them to dissolve in water they would have to break some of water s hydrogen bonds. Water will not do this so the oil is forced to stay separate from the water.
Explanation:
How does the large intestine help to maintain the body’s fluid balance, or homeostastis?
Answers
what is the main advantage of live attenuated vaccine?
a) it provides more durable immunity; boosters may be required, though less frequently than would otherwise be necessary
b) is it safer than other kinds of vaccines
c) it does not cause any severe side effects or complications
d) it is suitable for people with any type of health
Answers
Answer:
It would be a because it helps with immunity
3. If the plasma membrane wasn't selectively permeable, what would
happen to your cells when you took a shower? How would this affect
you? (3 points)
Answers
Answer:
Our body will swell.
Explanation:
If the plasma membrane wasn't selectively permeable, the cell will swell and burst due to high concentration of water go inside the cell. If the cell has no selectively permeable membrane, the flow of liquid is incontrollable both inside and outside of the cell. The cell maintain homeostasis due to the selective permeability of plasma membrane so if we took shower all the water go inside the cell and our body swells.
5. Divide the following signed numbers:
please help will give extra
a.
-8
-2
b.
+9
-1
c.
-12
-48
Answers
Answer:
-8-2=-10
+9-1=8
-12-48=-60
Explanation:
In the presence of oxygen, glucose is used by cells to produce cell energy or ATP. But we do not just eat glucose! Our diet includes a variety of foods, including three that you see here. Consider the chemical formulas of the three molecules. Would any of them provide the glucose that cells need to produce ATP? Explain.
Responses
A Sucrose could be used because it is composed of glucose molecules.Sucrose could be used because it is composed of glucose molecules.
B All three could be used because the elements C, H, and O are present and can be rearranged to form glucose.All three could be used because the elements C, H, and O are present and can be rearranged to form glucose.
C The two molecules that classified as carbohydrates can be used because they are similar to glucose structurally.The two molecules that classified as carbohydrates can be used because they are similar to glucose structurally.
D None of them can be used. You must provide an exact source that contains 6 carbon and oxygen and 12 hydrogen atoms.None of them can be used. You must provide an exact source that contains 6 carbon and oxygen and 12 hydrogen atoms.
Answers
The two molecules that are classified as carbohydrates are used as a source of glucose to provide energy during cellular respiration, hence option C is correct.
How glucose provides energy?Carbohydrates polysaccharides and disaccharides provide the glucose units for cellular respiration and in protein, some amino acids are glucogenic, which are converted to glucose flow through cellular respiration and provide the ATP.
The initial process of breaking down glucose to release energy for cellular metabolism is called glycolysis. An energy-consuming phase and an energy-releasing phase make up glycolysis.
Therefore, option B is correct.
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Two gases that plants must exchange with the air are: a. oxygen and nitrogen. b. oxygen and carbon dioxide. c. carbon dioxide and nitrogen. d. carbon dioxide and carbon monoxide.
Answers
i belive it is B. oxygen and carbon dioxide
Plants use carbon dioxide for photosynthesis and oxygen is a product of photosynthesis.
The two gases that plants must exchange with the air are oxygen and carbon dioxide. Oxygen is required for respiration while carbon dioxide is required for photosynthesis. The exchange of these gases is essential for the survival of plants and for maintaining the balance of gases in the atmosphere. Option B)
The two gases that plants must exchange with the air are oxygen and carbon dioxide. Plants consume carbon dioxide during photosynthesis and release oxygen back into the atmosphere. This process of photosynthesis occurs in the chloroplasts of the leaves and involves the absorption of sunlight and conversion of carbon dioxide and water into glucose and oxygen.
In the process of respiration, plants use oxygen to break down glucose and release energy. The waste product of respiration is carbon dioxide, which is released back into the atmosphere. This exchange of gases is vital for the survival of plants as well as for maintaining the balance of gases in the atmosphere.
Oxygen is important for the survival of all living organisms, including plants. It is required for respiration, which is the process of releasing energy from food. Carbon dioxide, on the other hand, is a waste product of respiration and is required for photosynthesis. The exchange of these two gases between plants and the atmosphere is essential for the survival of both. Therefore option B) is correct.
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HELP!!! Which of the following would have the least impact on primary productivity in the euphotic zone?
A. The release of nutrients from bacterial decomposers
B. The availability of limiting nutrients
C. The emission of hydrogen sulfate along hydrothermal vents
D. The availability of sunlight
Answers
The answer is D
how food energy is transferred through a kelp forest food chain identify the roles of the organism in the food chain identify the producer, primary consumer(herbivore) secondary consumer and tertiary consumer
Answers
Energy is transferred through a kelp forest food chain, starting with the kelp as the producer, followed by herbivores as primary consumers, and then secondary and tertiary consumers preying on each other.
What is the Kelp Forest Food Chain?In a kelp forest food chain, the producer is the kelp itself, which uses sunlight to perform photosynthesis and create organic matter.
The primary consumers are herbivores, such as sea urchins, snails, and abalone, that feed on the kelp. Secondary consumers, such as small fish, crabs, and octopuses, prey on the herbivores, while tertiary consumers, such as sea otters and larger fish, feed on the secondary consumers.
Energy is transferred through the food chain as each organism consumes the organism below it, with energy being lost at each trophic level due to heat and metabolic processes. The kelp forest food chain is an example of how energy flows through an ecosystem, with each organism playing a vital role in maintaining the balance and sustainability of the ecosystem.
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The diagram below represents a microscopic structure observed during the process of cell division.
Letter A indicates...
Centromere
Nucleolus
Chromatid
Ribosome
Answers
Answer:
Centromere
I hope it helps.
You conduct an experiment to determine the concentration of ions in an unknown solution. You place 300mL inside a dialysis bag and place the bag into a beaker of water with an ion concentration of 100 ppm (parts per million). When you check the experiment an hour later, the bag is swollen and has taken in water. What can you conclude?
Answers
The conclusion is that water has moved from the beaker into the bag by osmosis because concentration of solute in the beaker is lower than that in the bag.
What is osmosis?Osmosis is the movement of water molecules across a semipermeable membrane from a solution of low solute concentration to one of high solute concentration.
The concentration of solute in the beaker is lower than that in the bag, therefore, water will move from the beaker into the bag by osmosis.
In conclusion, the solution in the beaker is of lower solute concentration than in the bag.
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What question about the flow of matter and energy during fermentation does the experiment answer?
A
Does sugar combine with water to provide energy for yeast?
B
Do yeast consume gasses in order to undergo reproduction?
C
Does water provide yeast with energy to undergo respiration?
D
Do yeast use sugar for energy and produce a gas?
Answers
The question about the flow of matter and energy during fermentation that the experiment answers is: Do yeast use sugar for energy and produce a gas?
The correct option is D.
What is fermentation?Fermentation is the process by which organisms break down food molecules to produce energy in the absence of oxygen.
Fermentation is a process of anaerobic respiration.
The anaerobic respiration that occurs in muscles is known as lactic acid fermentation.
In yeast cells, the anaerobic respiration that occurs is called alcohol fermentation. Alcohol is produced as well as carbon dioxide gas.
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Compare mitosis and meiosis in the following two attributes:
- the number of copies of DNA and whether the copies are different
-what kinds of cells undergo these two processes
Thank you!
Answers
Mitosis may be defined as a type of cell division in which a parental cell is divided into two daughter cells that are genetically identical to them. These daughter cells are diploid in nature. Somatic cells of the body undergo this process of cell division.
What is Meiosis?Meiosis may be defined as a type of cell division in which a parental cell is divided into four daughter cells that are genetically unique to them. These daughter cells are haploid in nature. Germ cells (gamete cells) of the body undergo this process of cell division.
Therefore, the comparison of mitosis and meiosis in the following attributes is well described above.
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Atrazine is one of the most widely used herbicides throughoutthe world. Some studies have shown that the chemical has affectedthe sexual development of frogs, most notably, leopard frogs (Rana pipiens).femalemaleOne study suggested that male tadpoles exposed to the herbicide develop into female frogs. These mutated female frogs, accordingto the study, have the ability to reproduce with other males. However, the mutated frogs can only produce male offspring.This case demonstrates howA. the activities of organisms can change the environments in which they live.OB. chemicals introduced to the environment by humans affect only the organisms they were designed to affect.OC. factors in the environment can change the characteristics of organisms.D. chemicals introduced to the environment by humans have no effect on the ecosystem.
Answers
The case the exersice tells is an example of how introduced subtances to a particular environment have a negative impact on the species' health, as states the C answer option: "factors in the environment can change the characteristic
Genetic modification is used to develop plant and animal species that have new traits. If genetically modified plants are introduced in a natural habitat, they may act in a manner similar to an invasive species. What could be the best solution to prevent them from becoming an invasive species?
a.
Use pest control
b.
Plant more native trees.
c.
Develop plants that are unable to reproduce.
d.
Use more fertilizer to promote the growth of genetically modified plants.
Answers
The best solution to prevent them from becoming an invasive species is to develop plants that are unable to reproduce. Thus, the correct option is C.
What are Invasive species?Invasive species may be defined as the group of organisms that are not indigenous, or native, to a particular area.
If such genetically modified plants have the characteristics of reproduction, then they produce offspring which are extremely different from the native population. This in the future leads to the process of speciation if can not be regulated in a limited manner.
Therefore, the correct option for this question is C.
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Which environment will most likely result in the formation of coal?
Responses
a riverbed in which sediment piles up after a flood or other natural disaster
a riverbed in which sediment piles up after a flood or other natural disaster
an area in which the remains of plants and animals have collected
an area in which the remains of plants and animals have collected
a shallow, salty inland sea
a shallow, salty inland sea
a small area located deep within a volcanic mountain
Answers
An environment will most likely result in the formation of coal is an area in which the remains of plants and animal remnants have collected. The correct option is B.
Thus, the environment that coal is most likely to originate in is one where plant and animal remnants have accumulated. Ancient plant and animal remnants that have been buried, heated, and compressed for millions of years are what coal is made of.
The pressure and heat from the earth's interior lead the organic material to transform into coal as it is buried further and deeper. Coalification is the name given to this process. In sedimentary rock formations, including those that were previously swamps or peat bogs, where plant debris and animal remnants was plentiful and could collect over time, coal is frequently discovered.
Thus, the ideal selection is option B.
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Were you surprised to learn that there are so many technological tools to study the brain's structure and functions ? Which techniques do you find the most Interesting ? Why?
Answers
There are several techniques that can be used in studying the brain of human beings such as magnetic resonance imaging, magnetoencephalography etc.
Some of the techniques that are used to study the structure of the brain and ita functions are:
Electroencephalogram (EEG): This is used for the detection of electrical activity in the human brain. It helps in the detection of abnormalities that an individual can have in their brain. Magnetoencephalography (MEG): This is a technique that's used for investigating the activities of the human brain. In this test, sensors are used in the formation of an image regarding magnetic fields that are produced within the human brain.Magnetic resonance imagining: This is when radio waves that are computer generated and magnetic fields are used in testing the brain. This helps in providing images of the brain.
In conclusion, the above techniques are used in testing the brain in order to carry out further research on the person.
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This diagram shows a red blood cell in a beaker that contains a solution with a
higher salt concentration than that inside the red blood cell.
high salt concentration
low salt concentration
What will happen to the red blood cell in this environment?
A. The size of the red blood cell will remain constant.
B. The red blood cell will swell at first and then shrink.
C. The red blood cell will swell from absorbing salt molecules.
D. The red blood cell will shrink from losing water molecules
Answers
Answer:
3. D. The red blood cell will shrink from losing water molecules
59. C. Glucose + Oxygen —> Carbon dioxide + Water
Explanation:
The red blood cell has a lower salt concentration than the liquid which means that it has a higher water concentration than the liquid.
By the process of osmosis, water will flow from the red blood cell to the liquid which would lead to the red blood cell shrinking in size.
Cellular respiration is used to create energy for cells. It works by burning glucose in the presence of oxygen. The result is an outburst of energy and CO2 as well as water.
HELP PLEASE
Which is a structure of the lymphatic system?
kidney
bone marrow
stomach
thyroid
Answers
Answer:
thyroid
Explanation:
hope its right
Answer:
The lymphatic system consists of all lymphatic vessels and lymphoid organs. For example, the lymph nodes, spleen, thymus as well as the lymphatic tissue found in the small intestine (Peyer’s patches) and throat (adenoid tonsils, palatine and tubal tonsils), to name a few, all represent lymphatic organs.
Hence, rather than representing a single organ, the lymphatic system comprises a circulatory network of vessels and lymphoid tissue and cells in every part of the body. It works together closely with the blood-producing (haematopoietic) system in the bone marrow, thereby playing a vital role in immune responses to protect the body from various pathogens. Also, the lymphatic vessel network helps transporting nutrients and waste products in the body.
Explanation:
Hope it helps!
Example of the nucleus acid include
Answers
Answer:
Explanation:
Two examples of nucleic acids include deoxyribonucleic acid (better known as DNA) and ribonucleic acid (better known as RNA). These molecules are composed of long strands of nucleotides held together by covalent bonds
what is biology ? definition of biology
Answers
Answer:
The study of living organisms divided into many specialized fields that cover their morphology physiology anatomy behavior origin and distribution
What feature can you only find at subduction zones?
Answers
The main features of subduction zones include ocean trenches, volcanoes, and mountains. Earthquakes also happen as a result of these collisions. When two continental plates collide, the land is broken and pushed upwards, creating mountain ranges.
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What did Hamilton smith notice in 1972
Answers
Answer:
that the phage DNA degraded over time.
Explanation:
The brain and spinal cord are part of the _______ nervous system. The electrical charges that act as nervous signals are called _______. Jellyfish do not have a brain. Instead their nervous system is called a _______. After nervous systems began to develop in bilaterally symmetric animals, some developed ventral, or front, nerve cords, while chordates developed _______ nerve cords. Skeletons that allow for movement by using muscles and squeezing liquid to change the body shape are called _______ skeletons. _______ do not grow with arthropods, and so occasionally must be shed and regrown from chitin. Muscles move endo- and exoskeletons by _______. _______ is the joining of two gametes called sperm and egg. A fish that lays her eggs in a cluster is initiating _______ fertilization. _______ are an adaptation by reptiles to allow for reproduction and embryo development on land. Describe three different strategies used by three different animals to thermoregulate. If you see a snake coiled up in a sunny patch of grass, what can you probably conclude about the type of thermoregulator it is. Why?
Answers
The brain and spinal cord are part of the central nervous system.
The electrical charges that act as nervous signals are called action potentials or nerve impulses.
Jellyfish do not have a brain. Instead, their nervous system is called a nerve net.
After nervous systems began to develop in bilaterally symmetric animals, some developed ventral nerve cords, while chordates developed dorsal nerve cords.
Skeletons that allow for movement by using muscles and squeezing liquid to change the body shape are called hydrostatic skeletons.
Exoskeletons do not grow with arthropods, and so occasionally must be shed and regrown from chitin.
Muscles move endo- and exoskeletons by contracting and relaxing.
Fertilization is the joining of two gametes called sperm and egg.
A fish that lays her eggs in a cluster is initiating cluster or mass fertilization.
Amniotic eggs are an adaptation by reptiles to allow for reproduction and embryo development on land.
Describe three different strategies used by three different animals to thermoregulate.
Elephants: Elephants thermoregulate by using their large ears as cooling devices. They flap their ears to increase surface area and enhance heat loss through evaporative cooling.Desert Lizards: Desert lizards employ behavioral thermoregulation by basking in the sun to absorb heat and warming their bodies. They also retreat to shade or burrows to avoid excessive heat when needed.Penguins: Penguins have a unique thermoregulation strategy. They huddle together in large groups to conserve body heat and shield themselves from the cold Antarctic winds, effectively reducing heat loss and maintaining body temperature.If you see a snake coiled up in a sunny patch of grass, what can you probably conclude about the type of thermoregulator it is. Why?
If you see a snake coiled up in a sunny patch of grass, you can probably conclude that the snake is an ectotherm. Ectotherms rely on external heat sources, such as the sun, to regulate their body temperature. By basking in the sun, the snake absorbs heat, which helps raise its body temperature to a suitable level for proper physiological functioning.
Answer:
1. central
2. action potential
3. nerve net
4. dorsal
5. hydrostatic
6. Exoskeletons
7. contraction/contracting
8. Fertilization
9. external fertilization
10. Eggs
11. Animals with fur thermoregulate by panting. Winged birds will flap against their mouths/heads to dissipate heat. Humans will produce sweat to evaporatively cool. Polar bears have developed blubber. Bears drop body temperatures during hibernation.
12. Seeing a snake using the warmth of the sun leads us to conclude that it is likely a thermo conformer that cannot produce its own body heat.
(HELP!!)
With a partner, research each of the identified moons. Compare and
contrast a chosen characteristic-surface features, composition, structure.
distance from the planet-for each of the moons. Use your Science
Notebook if you need more room.
Answers
Surface Features: The Moon's surface is covered with various features, including impact craters, mountains, valleys, and large flat plains called maria. It lacks an atmosphere, so erosion and weathering processes are minimal.
Composition: The Moon is primarily composed of rocks rich in silicates, such as basalt and anorthosite. It also contains small amounts of metals like iron and traces of water ice in permanently shadowed regions.
Structure: The Moon has a layered structure, with a crust, mantle, and a small core. The crust is thinner on the near side and thicker on the far side. The absence of tectonic activity has resulted in fewer geological changes compared to Earth.
Distance from the Planet: The Moon is Earth's only natural satellite and is located at an average distance of about 384,400 kilometers from Earth.
Saturn's Moon, Titan:
Surface Features: Titan has a diverse surface, including vast dune fields, lakes, and rivers of liquid methane and ethane. It also has mountains and cryovolcanoes that erupt with icy materials instead of molten rock.
Composition: Titan's surface is composed of a mixture of water ice, hydrocarbons, and organic compounds. Its atmosphere is primarily nitrogen with traces of methane and other hydrocarbons.
Structure: Titan has a rocky core, surrounded by layers of water ice and a thick atmosphere. The presence of lakes and rivers of liquid methane suggests the possibility of a subsurface ocean of liquid water beneath the icy crust.
Distance from the Planet: Titan is the largest moon of Saturn and is located at an average distance of about 1.2 million kilometers from Saturn.
Complete the following flowchart to describe the different nutrient requirements for bacteria.
Answers
Autotrophs can produce their own food. Photoautotrophs can produce food by utilizing sunlight, and chemoautotrophs reduce the organic compound. Heterotrophs depend on others for food, while chemoheterotrophs depend on organic food.
What are different sources of nutrition?
The organisms that can make food are autotrophs, and they can be of two types: photoautotrophs (which use sunlight) and chemoautotrophs (which make organic compounds from inorganic materials). Photoautotrophs can either produce oxygen (oxygenic) or can't produce oxygen (anoxygenic), while chemoautotrophs are of two types. The bacteria that convert ammonia to nitrates are called "nitrifying bacteria," and those that oxidize sulfur are called "sulfur oxidizing bacteria." Heterotrophs depend on others for food, such as plants, and chemoheterotrophs depend on other organic materials.
Hence, the correct answer is that autotrophs can produce their own food. Photoautotrophs can produce food by utilizing sunlight, and chemoautotrophs reduce the organic compound. Heterotrophs depend on others for food, while chemoheterotrophs depend on organic food.
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