How many years was darwin on his expedition to explore, observe, and study the natural world?.
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Answer:
five straight good years
Explanation:
Related Questions
Which statement best summarizes the negative feedback loop of the hormones that regulate calcium and bone metabolism?
a) High calcium levels trigger hormone release, leading to increased bone resorption.
b) Low calcium levels trigger hormone release, leading to increased bone formation.
c) High calcium levels trigger hormone release, leading to increased bone formation.
d) Low calcium levels trigger hormone release, leading to increased bone resorption.
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As a result, option (a) is correct because high calcium levels will increase bone resorption and release hormones, causing a decrease in blood calcium levels.
Hormones regulating calcium and bone metabolism The answer to the question is option (a) High calcium levels trigger hormone release, leading to increased bone resorption.
What is calcium metabolism?
The process by which calcium is absorbed, transported, used in the body, and excreted is known as calcium metabolism. The bones serve as the primary storage location for calcium in the body. Hormones regulate calcium and bone metabolism. The hormones' primary function is to maintain blood calcium levels.
The negative feedback loop regulates calcium and bone metabolism by releasing hormones in response to high or low blood calcium levels. A negative feedback loop is a mechanism in which an output's variation causes a system's input to produce an output that is opposite in direction to the initial output variation. Hormonal regulation of calcium and bone metabolism follows a negative feedback loop to maintain calcium homeostasis.
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what are some good movies to watch
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what are characteristics of polygenic traits? select all that apply. responses on a histogram, traits distribute on a bell-shaped curve. on a histogram, traits distribute on a bell-shaped curve. traits are always found in a 9:3:3:1 ratio. traits are always found in a 9:3:3:1 ratio. traits are continuous across a range. traits are continuous across a range. traits are discrete.
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The characteristics of polygenic traits are: on a histogram, traits distribute on a bell-shaped curve, traits are continuous across a range, and traits are not discrete. Thus, the correct options are option A, B, and F.
Polygenic traits refer to the characteristics that are governed by the interactions of more than one gene. These traits exhibit characteristics that are more complex in nature than other simple traits such as the dominant-recessive traits or the incomplete dominance traits.
Polygenic traits can be continuous or qualitative in nature, and traits like skin color, height, and hair color are some examples of polygenic traits.
In the case of polygenic traits, each additional gene contributes to a new level of expression, and thus, these traits exhibit a continuous distribution of phenotypes. As a result, the distribution of polygenic traits on a histogram is usually bell-shaped with the majority of the individuals lying in the middle of the distribution.
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can someone help me with this please
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Answer:
statement box : 1, 2 & 5
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Explanation: the answer is there
regarding the set point, fat cells, and obesity, which of the following statements is false? question 3 options: a) when leptin is released into the bloodstream, it tells your brain that you need to eat more. b) there is currently no known way to lower your set point for fat since the number of fat cells remains unchanged throughout adult life. c) when your body goes below its set point, you will feel hungry most of the time. d) your set point is the weight you maintain when you are making no effort to gain or lose weight.
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When leptin is released into the bloodstream, it tells your brain that you need to eat more is the false statement.
What are the functions of leptin?Leptin is a hormone predominantly made by adipose cells and enterocytes in the small intestine that helps to regulate energy balance by inhibiting hunger, which in turn diminishes fat storage in adipocytes.
The circulating leptin level serves as a gauge for energy reserves and directs the central nervous system to adjust food intake and energy expenditure accordingly.
Plasma leptin levels decrease during fasting or energy restriction and increase during refeeding, overfeeding, and surgical stress.
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How many genetically distinct "generations" are found in a mature angiosperm seed?
a. 1
b. 2
c. 3
d. 4
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I hope this helps!!! :)
Could someone help me:)
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What part of a neuron cell relays signals between neurons, or from a neuron to the target tissue?.
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Answer: The correct answer is axon terminal
The part of a neuron cell that relays signals between neurons, or from a neuron to the target tissue, is the synaptic terminal.
What is a synaptic terminal?The movement of membrane-bound sacs, or synaptic vesicles, toward the presynaptic membrane, is triggered by the arrival of a nerve impulse at the presynaptic terminals. These vesicles fuse with the membrane and release a chemical known as a neurotransmitter.
The nervous system's excitable neuron or nerve cell has a cell body or soma (karyon), dendrites, and an axon. Dendrites are a group of many, short filaments that are in charge of receiving signals.
Therefore, the synaptic terminal is a component of a neuron cell that transmits messages from one neuron to another or from a neuron to the intended tissue.
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Please Help me with this question!!
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Bats hunt using echolocation, in which they send and receive high frequency sounds to locate prey. When bats hear the sounds of others, they typically begin hunting in the same area. As the number of bats hunting in the area increases, individuals become more successful at locating and capturing prey.
Some populations of bats live in areas with high levels of noise pollution, such as near heavily trafficked bridges. How might the hunting behavior of bats be affected by such an environment?
A.
Bats would be better able to use echolocation, which would improve their ability to find prey.
B.
Bats would be unable to use echolocation, which would prevent them from finding any prey.
C.
Bats would be more likely to hunt in groups, so an individual's success in catching prey would increase.
D.
Bats would be less likely to hunt in groups, so an individual's success in catching prey would decrease.
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We talked a lot about how life arises from non-living molecules through certain “emergent
properties”. What is one theory that scientists have put forth to explain how the first non-living
molecules may have started to resemble life as we know it (multiplying, carrying out
biochemistry), and what evidence supports their claim?
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Answer:I think Dwarnism/NeoDwanisim
Explanation:
cystic fibrosis affects the lungs, the pancreas, the digestive system, and other organs, resulting in symptoms ranging from breathing difficulties to recurrent infections. which of the following terms best describes this expression of phenotypes? group of answer choices pleiotropy incomplete dominance epistasis multiple alleles
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Cystic Fibrosis have clinical phenotypes that mainly include chronic lung infection, gastrointestinal tract alterations, and infertility in men.
In a monogenic, recessive disorder consisting of Cystic Fibrosis, genotype as a primary motive constitutes the starting point and is commonly represented through sickness-inflicting mutations living on separate alleles.
The Cystic Fibrosis phenotype is noticeably heterogeneous even among siblings wearing same CFTR mutations, suggesting that the sickness severity is laid low with the CFTR genotype as well as by environmental and other genetic factors, along with alternative genomic loci containing modifier genes.
Someone who's homozygous for the recessive allele will broaden Cystic Fibrosis. A person who is heterozygous or homozygous for the dominant allele will no longer increase cystic fibrosis. In example one, both parents are heterozygous Ff, they're vendors of the disease.
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yibble yabble give me answer plz
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Answer:
Nucleotide is the monomer for a nucleic acid.Explanation:
Nucleic acids are long chain polymers of nucleotides, so they are also called polynucleotides.
What is the Monomer for a Nucleic Acid?
Answer:-Nucleotide is the Monomer for a Nucleic Acid.
Nucleotides are the basic component of nucleic acids. Nucleotides are composed of phosphate groups and sugar molecules (either RNA ribose or DNA deoxyribose) bound to nitrogen-containing substances.Write an essay describing your chosen genetic disorder. Include information about the genetic mutation that cause the disorder the effects and symptoms of the mutation how it is acquired and how common it is
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A genetic disease is a condition that, entirely or in part, results from a change in the usual DNA sequence.
Sickle cell anemia is one of the inherited illnesses. The structure of red blood cells, which carry oxygen to every part of the body, is impacted.Typically rounded and flexible, red blood cells may flow through blood veins with ease. Sickle cell anemia is characterized by red blood cells having crescent-shaped or sickle-shaped hemoglobin. These sickle cells also form a tough, sticky covering that may slow or prevent blood flow. Cause: A mutation in both copies of the hemoglobin-Beta gene (HBB) gene on chromosome 11 results in the hereditary illness sickle cell disease (SCD). An element of hemoglobin, the protein in red blood cells that carries oxygen, is encoded by this gene. Because of the mutation, hemoglobin molecules clump together to form red blood cells with a sickle shape.Symptoms: Anemia, Periodic episodes of extreme pain, Swelling of hands and feet, Frequent infections, Delayed growth or puberty and Vision problems.You receive 1 set each from your father and mother as inheritance. A kid must receive a copy of the sickle cell gene from both of its parents in order to be born with sickle cell disease. This often occurs when both parents have the sickle cell trait, commonly known as being "carriers" of the sickle cell gene.Learn more about the Genetic disorder with the help of the given link:
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what source of energy drives the water cycle
A. wind energy
B. temperature differences
C. sun light
Answers
Answer:
The source of energy that drives the water cycle is C. Sunlight.
Explanation:
The source of energy that drives the water cycle is C. Sunlight.
The sun's energy causes water to evaporate from oceans, lakes, and other bodies of water, forming water vapor that rises into the atmosphere. As the water vapor cools and condenses into clouds, it releases heat energy, which helps to power atmospheric circulation and weather patterns. When the clouds release precipitation in the form of rain or snow, the water returns to the surface and the cycle starts again.
So, the sun's energy is the primary driver of the water cycle.
brain development is characterized by: question 8 options: 1) a doubling of the brain's size and volume. 2) a sharp increase in the number of unused synaptic connections among neurons. 3) a large increase in the number of neurons, but a decrease in the number of synaptic connections among neurons. 4) the selective elimination, called pruning, of unused dendrites, neurons, and synaptic connections.
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The brain development is characterized by a doubling of the brain's size and the volume.
Brain development builds on itself as connections eventually become linked together in more complex ways. Early childhood is the perfect time for a child's brain to develop the connections it needs to become a healthy, capable adult.
Brain development is a lifelong process. Its development is most pronounced during the prenatal period when the embryonic precursors of the nervous system begin to rapidly proliferate, migrate and differentiate, resulting in a similar appearance at birth and an 80-year-old adult brain. It becomes a brain that reaches 80%.
There are 7 stages of brain development, they are
Cell brithCell migrationCell differentiationCell maturationSynaptogenesis.Cell death and synaptic pruning.Myelogenesis.Learn more the brain development in
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How many plants are needed to support a population of fish?
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Answer:
it depends what kind of fish it is
What is the carrying capacity of the graph?
0.3 million
0.5 million
2012
2007
0.4 million
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Answer: B
Explanation:
i know
The following is a short section of a DNA template before replication:
3’ TACGGCTTAACC 5’
Based on your knowledge of DNA replication, which sequence would be the correct complementary strand synthesized by DNA polymerase?
5’ AUGCCGTTUUGG 3’
5’ GGTTAAGCCGTA 3’
5’ ATGCCGAATTGG 3’
5’ CCAATTCGGCAT 3’
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3’ TACGGCTTAACC 5’ based on knowledge of DNA replication, the correct complementary strand synthesized by DNA polymerase is
5’ ATGCCGAATTGG 3’ (option -c) is correct answer.
What is the procedure for DNA replication?There are three main steps in the replication process: priming the template strand, assembly of the new DNA segment, and opening of the double helix and separation of the DNA strands. The DNA double helix's two strands uncoil during separation at a specific spot known as the origin.
Additionally, in vitro DNA replication (DNA amplification) is possible (artificially, outside a cell). Starting DNA synthesis at recognized sequences in a template DNA molecule is possible using artificial DNA primers and cell-isolated DNA polymerases.
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PLS HELP!!!! a base is a substance that forms hydrogen ions in a water solution. True or False?
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Answer:
False
Explanation:
which steps of recombination caused that only half of all recombination events generate a recombinant phenotype? group of answer choices strand exchange ligation recognition and alignment resolution band migration flag question: question 5
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Only 50% of recombination events result in a recombinant phenotype due to homologous recombination. strand exchange ligation recognition and alignment resolution band migration flag is a collection of possible answers.
Only 50% of all recombination events result in a recombinant phenotype, according to Resolution Ligation Recognition and Alignment Band Migration Strand Exchange. FtsK, which triggers recombination by making XerD catalyze the exchange of the initial pair of strands, is necessary for chromosome dimer resolution. Replicative recombination, which creates a new copy of a DNA segment, is the third type. To create a new copy of the transposable element at a different place, many transposable elements use a replicative recombination mechanism.
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tay-sachs disease is caused by a loss of function mutations in a gene on chromosome 15 that encodes for a lysosomal enzyme. tay- sachs is inherited as an autosomal recessive condition (tt). among ashkenazi jews of central europe ancestry, about 1 in 3600 children are born with the disease. calculate the frequency of the t and t alleles in this population and the frequency of the genotypes. express you answers as a percentage and round to the nearest tenth for the first four answers
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The frequency of the T allele in the Ashkenazi Jewish population is 0.018, and the frequency of the t allele is 0.982. The frequency of the TT genotype is 0.0003, the frequency of the Tt genotype is 0.036, and the frequency of the tt genotype is 0.963.
Tay-Sachs disease is caused by a loss of function mutations in the HEXA gene, which encodes for the lysosomal enzyme hexosaminidase A. The disease is inherited as an autosomal recessive trait, meaning that an individual must inherit two copies of the mutant allele (tt) to express the disease phenotype. In the Ashkenazi Jewish population, the carrier frequency for the t allele is approximately 1 in 30 individuals, or 0.033. Using the Hardy-Weinberg equation, we can calculate the frequency of the T allele (p) as 1 - 0.033 = 0.967 and the frequency of the t allele (q) as 0.033. The frequency of the TT genotype (p^2) is 0.967^2 = 0.935, the frequency of the Tt genotype (2pq) is 2(0.967)(0.033) = 0.064, and the frequency of the tt genotype (q^2) is 0.033^2 = 0.001. Therefore, the frequency of the TT genotype is 93.5%, the frequency of the Tt genotype is 6.4%, and the frequency of the tt genotype is 0.1%.
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Niche-
Describe a specific organisms niche found in the Gobi Desert
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Answer:
Desert Niches
Adaptations include a species' selection of food, water and shelter as well as other facts of its behavior. Niches within desert ecosystems include open desert scrub, open grasslands, washes and sandy soils.
Explanation:
The chart lists organisms in five different categories living near the Texas Gulf Coast.
Organisms Living Near the Texas Gulf Coast
Vegetation
Mammals
Invertebrates
Fish
Birds
• Algae
• Willow oaks
• River otter
• Coyotes
• Shrimp
• Mosquitoes
• Red drum
Pygmy
surfish
.
• Laughing
gulls
• Wood ducks
Based on the chart, which food chain best models a flow of energy in this ecosystem?
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Answer:algae
Explanation:because algae is able to live any where water is at
Why do you think the bones of the legs are at particular risk for fractures in rod
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Adult muscle cells cannot become another type of cell because
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Answer: because they will divide
ASSIGNMENT 2.1.2. Give the numbers and names of the places (regions) where Chlorophyll-containing cells occur. 2.1.3. In which of the places in question 2.1.2 does most photosynthesis occur? 2.1.4. How is the part named in question 2.1.3. structurally adapted for process of photosynthesis? 2.1.5. Give the number and name of the tissue that transports the prod of photosynthesis to the rest of the plant. E.1.6. Name the components of tissue in question 2.1.5.
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2.1.2. The numbers and names of the places (regions) where Chlorophyll-containing cells occur are:
1. Epidermis2. Mesophyll3. PhloemWhat is the parts for photosynthesis?2.1.3. The mesophyll is the primary site of photosynthesis in plants. The mesophyll is a layer of cells that lies between the epidermis and the phloem. The mesophyll cells contain chlorophyll, which is the green pigment that captures sunlight and uses it to convert carbon dioxide and water into oxygen and glucose.
2.1.4. The mesophyll cells are structurally adapted for photosynthesis in several ways. First, the mesophyll cells are packed with chloroplasts, which contain chlorophyll. Second, the mesophyll cells have a large surface area, which allows them to absorb more sunlight. Third, the mesophyll cells have a thin layer of cytoplasm, which allows for the rapid diffusion of gases and nutrients.
2.1.5. Phloem
The phloem is a vascular tissue that transports food and nutrients throughout the plant. The phloem is made up of two types of cells: sieve tubes and companion cells. Sieve tubes are long, thin cells that are connected by small pores. Companion cells are smaller cells that are attached to sieve tubes. Companion cells help to provide energy and support for sieve tubes.
2.1.6. The components of the phloem tissue are:
Sieve tubesCompanion cellsPhloem parenchymaPhloem fibersFind out more on photosynthesis here: https://brainly.com/question/19160081
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4. Describe how turtles make it back to their birthplace after years away to nest?
Ready? Enter your answer here.
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The length of the ear is equal to the distance from the normal hairline to the
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The length of the ear is a measurement from the top to the bottom of the ear, typically taken along the outer curve.
The distance from the normal hairline to the ear is the measurement from the point where the hair starts growing on the forehead to the top of the ear. This distance can vary depending on the individual's hairline and the position of the ear on the head.
It is important to note that the length of the ear and the distance from the hairline to the ear are not directly related, as one measures the ear itself while the other measures the distance between two points on the head.
However, both measurements can be useful in determining the overall proportions of the head and face. It is also worth noting that the hairline can vary greatly between individuals, and may change over time due to factors such as age, hormonal changes, and hair loss.
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What does alteration of generation mean?
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Answer:
Alteration of generation, is the type of life cycle that occurs in those plants and algae in the Archaeplastida and the Heterokontophyta that have distinct haploid sexual and diploid asexual stages.
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