Answer:
d
Explanation:
d.gravitropism as it's both going downwards
In a separate study, 68 rock pocket mice were collected from four different, widely separated areas of dark lava rock. One collecting site was in Sonora, Mexico. The other three were in Chihuahua, Mexico. Dr. Nachman and colleagues observed no significant differences in the color of the rocks in the four locations sampled. However, the dark-colored mice from the three Chihuahua locations were slightly darker than the dark-colored mice from the Sonora population. The entire Mc1r gene was sequenced in all 68 of the mice collected. The mutations responsible for the dark fur color in the Sonora mice were absent from the three different populations of Chihuahua mice. No Mc1r mutations were associated with dark fur color in the Chihuahua populations. These findings suggest that adaptive dark coloration has occurred at least twice in the rock pocket mouse and that these similar phenotypic changes have different genetic bases.
Complete question:
In a separate study, 68 rock pocket mice were collected from four different, widely separated areas of dark lava rock. One collecting site was in Sonora, Mexico. The other three were in Chihuahua, Mexico. Dr. Nachman and colleagues observed no significant differences in the color of the rocks in the four locations sampled. However, the dark-colored mice from the three Chihuahua locations were slightly darker than the dark-colored mice from the Sonora population. The entire Mc1r gene was sequenced in all 68 of the mice collected. The mutations responsible for the dark fur color in the Sonora mice were absent from the three different populations of Chihuahua mice. No Mc1r mutations were associated with dark fur color in the Chihuahua populations. These findings suggest that adaptive dark coloration has occurred at least twice in the rock pocket mouse and that these similar phenotypic changes have different genetic bases.
How does this study support the concept that natural selection is not random?
Answer:
The study supports the concept that natural selection is not random because in different areas with the same or very similar environmental characteristics, the same phenotype was produced by different types of mutations.
Explanation:
All of the sampled animals are inhabiting dark substrate. Probably animals needed to camouflage to survive. Natural selection must have driven them to produce dark color, similar to the substrate color. So animals from the different regions suffered different mutations that drove them to have almost the same dark fur color. The environmental condition is favoring the same phenotype.
how would planting more biodiversity be better for ecosystems? and how would it be better for farmers?
answer:
biodiversity provides functioning ecosystems that supply oxygen, clean air, and water, pollination of plants, pest control, wastewater treatment, and many ecosystem services. seeing as how biodiversity is the basis of agriculture and our food systems. agricultural biodiversity also performs ecosystem services such as soil and water conservation, maintenance of soil fertility, conservation of biota, and pollination of plants, all of which are essential for food production and for human survival.
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PLEASE HELP ME WITH SOME QUESTIONS
1. What is a convection current?
2. How do thermometers work?
Answer:
1.a current in a fluid that results from convection.
2.measures temperature through a glass tube sealed with mercury that expands or contracts as the temperature rises or falls.
Explanation:
Answer:
1.A convection current is a process that involves the movement of energy from one place to another. It is also called convection heat transfer. What is the reason that makes you feel hotter when placing hands above a campfire or when sitting next to it? Or, why is the movement of liquid so rapid when water is boiled in a pot? These things happen as a result of the Convection Currents.
Explanation:
2. A thermometer measures temperature through a glass tube sealed with mercury that expands or contracts as the temperature rises or falls. ... As temperatures rise, the mercury-filled bulb expands into the capillary tube. Its rate of expansion is calibrated on the glass scale.
What is soil structure?
Answer:
Soil structure is defined by the way individual particles of sand, silt, and clay are assembled. Single particles when assembled appear as larger particles. These are called aggregates.
Explanation:
Aggregation of soil particles can occur in different patterns, resulting in different soil structures. The circulation of water in the soil varies greatly according to structure, Therefore, it is important for you to know about the structure of the soil where you plan to build a fish-farm. Although you may not be able to assemble all this information yourself, the specialized technicians from the soil testing laboratory will be able to provide it after examining your undisturbed soil samples. They will be able to tell you if your soil has bad structure or good structure (pores/capillary canals, network, etc.). They will also be able to tell you about the degree of water circulation or permeability.
Linnaeus based one of his classification categories on plants. He even named the Kingdom Plantae. Which best describes the organisms in this kingdom?
A. They are autotrophic and have eukaryotic cells
B. They are made of prokaryotic cells
C. They are multicellular and do not have cell walls
D. They are always single celled and produce their own food
Answer:
b
Explanation:
all plants are make of prokaryotic cells.
3 This is the menstrual phase wherein pregnancy is possible.
c) menstrual phase
d) ovulation phase
a) Tollicular phase
b) luteal phase
wires a woman for pregnancy.
Answer:
ovulation phase
Explanation:
The ovulation phase is the only time during your menstrual cycle when you can get pregnant. You can tell that you're ovulating by symptoms like these: a slight rise in basal body temperature
d) ovulation phase
Its called ovulation due to the egg leaving to ovary to then be fertilized by a sperm. Although it is possible for a woman to get pregnant during anytime in her cycle. I hope this helped a bit.
You are studying brain cells and you discover a protein neurotransmitter that you
think might be useful. You know the amino acid sequence of the neurotransmitter.
Explain:
a) how you would isolate and identify the neurotransmitter gene
b) how you would produce multiple copies of the gene for study
c) how you would produce large quantities of the neurotransmitter to see if it could be
used as a potential medication.
e
But if the male Himalayan rabbit's genotype is c(h)c, and it mates with an albino female whose genotype is cc isn't there a 25% chance that the offspring could be albino? and why can't you breed two Himalayan's together to get a Himalayan?
Answer: Go-ogle
Explanation: Is helpful
What are features of an ocean marine ecosystem?
ps. ANSWER THIS IMMEDIATLY NOW!!! thankyou
Answer:
Marine ecosystems are characterized by factors such as availability of light, food and nutrients. Other factors that affect marine ecosystems include water temperature, depth and salinity, as well as local topography. Changes in these conditions can change the composition of species that make up the marine community.
Which of the following statements about cell respiration is true?
A In the electron transport chain, Oz is converted to CO2.
B Glycolysis splits sugar to produce pyruvate and FADH2-
C Electrons leave the electron transport chain in a molecule of water (H20).
D
Both B and C are correct.
The statement which is true about cell respiration is; Choice B: Glycolysis splits sugar to produce pyruvate and FADH2-
Definition of terms:
Cellular respiration is a process used by all living organisms to convert glucose into energy.
Cellular respiration is a collection of three unique metabolic pathways: glycolysis, pyruvate oxidation, the citric acid cycle, and the electron transport chain.
Glycolysis; This pathway is anaerobic and takes place in the cytoplasm of the cell. This pathway breaks down 1 glucose molecule and produces 2 pyruvate molecule. A process which releases FADH2- in the process.Pyruvate Oxidation: In eukaryotic cells, the mitochondria is the site of pyruvate oxidation. The release of CO2 is a characteristic of this step.The Electron transport chain: The electron transport chain is the final component of aerobic respiration and is the only portion of glucose metabolism that uses atmospheric oxygen.Electrons are rapidly transferred from one component to the next to the endpoint of the chain, where the electrons reduce molecular oxygen, O2 producing water in the process.
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In what ways do humans affect the carbon cycle?
The primary function of insulin in our bodies is to
O
A. store fuel for later use
B. regulate the amount of glucose in the blood
C. increase the efficiency of fuel consumption
o D. prevent digestive bacteria from consuming glucose
Answer:
B. regulate the amount of glucose in the blood
Explanation:
Insulin is a peptide hormone produced by the pancreas that lowers blood glucose levels and induces the transport of glucose within the cell
PLEASE HELP ME PLEASEE!
Introspection is one of the many sleeping disorders experienced
by people with sleep apnea.
Select one:
True
False
Answer:
The statement is false.
Explanation:
Sleep apnea is a respiratory disease characterized by the fact that people who suffer from it habitually snore, have repeated stops of breathing (apneas) and drowsiness during the day. As a consequence, patients who suffer from it cannot rest well during the hours of sleep.The obstruction of breathing causes a decrease in oxygen levels in the body, the persistence of this lack of oxygen could cause pulmonary hypertension and a future right-sided heart failure or myocarditis. Introspection, on the other hand, is the immediate reflective capacity of the human mind to know its own states; it is not associated with sleep apnea.
Chromosomes are...
A.DNA material coiled up in a pile
B.DNA material in pairs
C. DNA material in single strands
D. DNA material outside of the nuclear membrane
WILL GIVE BRAINLIEST
HELP URGENT!!!!!!!!!!!
Answer:
dominant trait
Explanation:
Recessive alleles can only show up when there is no dominant allele present to suppress them.
Answer: Dominant traits
Explanation:
Recessive traits only show up when there are no dominant alleles
Extraterrestrial traits are not a thing
A piece of alien DNA cannot multiply itself in the progeny cells of the organism because:
a. It has no the sequence called Origin of replication (ori) needed for starting replication.
b. A piece of DNA will be denatured and damaged soon as it has no stability.
c. A piece of DNA is easily unwound and the H bonds between nitrogen bases are broken.
d. Both A & B.
true or false the fertilized ovary develops into a seed
Answer:
true
Explanation:
I've done this it's TRUE
What best describes the structure of dna
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A double helix. It best describes the structure of a DNA molecule. Moreover, the DNA is not a single stranded and it does not comprise amino acids
Humans originated in Africa about 7 million years ago: if life on earth started 3.5bya ago and represented 24 hours from then to today, how many minutes of these 24 hours would be devoted to this 24-hour clock
a) since the first humans showed up?
b) since Humans showed up 300,000 ya?
which is true of the gallbladder?
- it creates white blood cells
- it stores bile
- it stores pancreatic amylase
- it stores pepsin
Answer:
It stores bile is the true of the gallbladder.Which enzyme functions to prevent supercoiling of the DNA molecule during replication?
A)
Helicase
B)
Topoisomerase
C)
RNA polymerase
D)
DNA polymerase
Answer:
B
Explanation:
Explain what would happen if the leaf tissue is kept at high temperature during the process of cell isolation
Answer:
Wilting of leaves occur.
Explanation:
if the leaf tissue is kept at high temperature during the process of cell isolation the leaf will shrink because of loss of all water. Due to high, temperature the stomata will be open and water is removed in order to remove heat from the body. A time comes that all water that is present in the cell will be removed and as a result wilting of leaves occur.
Clearly outline what differentiates Gram +ve bacteria from Gram -ve bacteria?
Answer:
Gram positive bacteria have cell walls composed of thick layers of peptidoglycan. Gram positive cells stain purple when subjected to a Gram stain procedure. Gram negative bacteria have cell walls with a thin layer of peptidoglycan.
Which is true regarding both mitosis
and meiosis?
A Both occur in only animal cells
B. All organisms go through both
mitosis and meiosis
C. They are both involved in cell division
D. None of the above
EuteckOut
bobof
Answer:
The correct answer is B. All organisms go through both mitosis and meiosis.
Explanation:
The same mechanisms of chromosomal segregation are at work in both mitosis and meiosis -- centrosomes, microtubules and motor proteins. Both mitosis and meiosis are multistage processes. The stages are interphase, prophase, metaphase, anaphase and telophase. The same general processes occur in each of these stages for mitosis and meiosis.
why are they called amino acids?
Answer:
You stated why it is called an amino acid, the name comes from the amine (amino) and the carboxylic acid (carboxyl group). Amines are weak bases, so the acid portion of the name must come from the carboxylic acid
Explanation:
hope it will help you
what are the the four main categories of organic macromolecules ?
Answer:
There are four major classes of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids), and each is an important component of the cell and performs a wide array of functions.
Four main categories of organic macromolecules are as follow:
carbohydratelipidsproteinsnucleic acidWhat are macromolecules?Macromolecules are polymers containing long chains of molecular sub-units known as monomers. These play an important role in biophysical processes and composed of thousands of atoms that are covalently bonded.
Carbohydrate is a biomolecule having carbon, hydrogen and oxygen atom.It is the main source of energy of the body.
Lipids are macromolecules that are insoluble in water and the main function is to serve as structural component of cell membrane.
Proteins are macromolecules that are extremely complex in structure and made up of amino acid residues joined by peptide bonds.
Nucleic acids are biopolymer macromolecules and composed of nucleotide. The function is to carry genetic information which helps to make RNA.
Therefore,Four main categories of organic macromolecules are as follow:
carbohydratelipidsproteinsnucleic acidLearn more about macromolecules here:
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Which statement best describes how the carbon cycle and oxygen cycle are interrelated?
Group of answer choices
Plants release water during transpiration and carbon dioxide during photosynthesis
Plants use carbon dioxide and release oxygen during photosynthesis
Animals release water during respiration and carbon dioxide during transpiration
Animals use carbon dioxide and release oxygen during respiration
Plants use carbon dioxide and release oxygen during photosynthesis
What are the nervous and endocrine systems controlling to maintain homeostasis?
O A. the body's nitrogen levels
B. the body's internal environment
OCthe body's external skin and hair
0
D. the body's support for movement
Answer:
B. the body's internal environment
Explanation:
Homeostasis is defined as the process of maintaining the internal environment of the body.
All the systems work together to maintain homeostasis. The nervous and endocrine systems are two important system that helps in maintaining homeostasis.
The nervous and endocrine systems are linked with hypothalamus that controls the internal environment of the body by releasing and inhibiting hormones. These hormones keep pH, temperature, and other internal conditions stable that support homeostasis.
Hence, the correct answer is "B. the body's internal environment".
What is the optimal pH that this enzyme functions at? And What is the optimal temperature that this enzyme functions at?
Answer:
Optimum Temperature is 35°C
Optimum PH is 7.0.
Explanation:
The optimum temp of enzymes is 20-35°c. They become inactivated at very low temperature and denatured (destroyed) at very high temp i.e. greater than 45°C. Low molecular weight enzymes are comparatively more heat stable.
The optimum pH of most enzymes is pH 7.0 (neutral pH).