Answer:
It can be explained by hybridization among human and neanderthal ancestral populations.
Explanation:
Next-generation sequencing (NGS) technologies coupled with bioinformatics tools have enabled to confirm admixture between Neanderthals and humans. The technique to identify admixture events consists in discovering nucleotide regions from neanderthal genomes that could be inserted in human genomes, thereby the observed sequence homology must be statistically significant (e-value). This emergent research field is known as paleogenomics.
Examples of stimulants include
a. Nicotine
b. Ecstasy
c. Dextromethorphan
d. A and B
Answer:
The answer to this question is d(A and B)
Explanation:
Hope this helps
Answer:
d but also c !
Explanation:
A and B are correct but also dextromethorphan has lower doses of stimulants
The woman marked with a question mark is your friend. Knowing that you are taking Genetics, she comes to ask you for advice: she wants to have children, but is afraid that they will be sick with the disease. Her husband and her mother have no family history of HD. What is the probability that she is sick? What is the probability that her children will be, without knowing her own status regarding the disease?
Answer:
Explanation:
The woman with the question mark is not sure if she has the HD disease,
The mother had no history of the disease this means she is not a carrier of the disease but we are not sure of the fathers genotype.
If the father is a carrier in an homozygous dominant form(aa) and the mother does not have the disease her. gentotype is AA
A A ×aa
Aa Aa Aa Aa This means all their offspring will be Carrier of the disease because each parents contributes 50% of the gene their offspring is made of.
The probability that she is sick is 0% but she could be a carrot of the disease in an heterozygote form
If the woman who is a carrier (Aa)of the disease marries a man with no history of the disease(AA)
Aa ×AA
I
AA AA Aa Aa
The probation of their offspring being a carrier in heterozygous form is 50% while the probability of the offspring being dominant of the disease is 0%. Hence, she should not be afraid since her mother and husband who could have contributed to determining the gene of this offspring are not carriers of this gene the offspring are safe.
Which statement best explains why fermentation occurs in mammals? It enables mammals to generate additional ATPATP in an oxygen‑rich environment. It breaks down lactic acid to generate a small amount of ATPATP under anaerobic conditions. It generates ethanol, which can be used as an alternative source of energy. It produces an acid that maintains blood pH within a narrow range. It allows glycolysis to continue under anaerobic conditions by replenishing NAD+NAD+ .
Answer:
The last option.
Explanation:
Fermentation/ Anaerobic respiration is important to supply ATP in the absence of oxygen.
In the presence of oxygen, glycolysis, Kreb's cycle and oxidative phosphorylation happen to provide about 32 ATP molecules. In its absence, only glycolysis can take place because it's the only step that doesnt need oxygen, to give a net supply of 2 ATP.
Even though glycolysis doesn't need oxygen, it needs NAD, and if the reduced NAD doesn't lose its hydrogens via oxidative phosphorylation, pyruvate (the end product of glycolysis) becomes the recipient of the hydrogen.
Pyruvate gets reduced to lactate.
The correct answer as to which best explains why fermentation occurs in mammals would be that it breaks down lactic acid to generate a small amount of ATP under anaerobic condition.
Aerobic respiration takes place in 3 steps:
Glycolysis: during which glucose is converted into pyruvate molecules with 2 ATP and 2NADH molecules produced.Citric acid cycle: during which pyruvate molecules from glycolysis are converted to CO2 with ATP, NADH, and FADH2 generatedElectron transport chain: during which the NADH and FADH2 produced in citric acid cycle are used to generate ATP.When oxygen becomes inadequate during rigorous activities in human cells, pyruvate molecules cannot proceed to the citric acid cycle due to lack of oxygen. Instead, the pyruvate molecules are converted to lactic acid through fermentation to generate 2 molecules of ATP.
More on lactic acid fermentation can be found here: https://brainly.com/question/2095032
Albino is a rare recessive genetic disease. Sally and her parents are normal but her sister is albino. It seems that Sally has chance to carry the albino allele. If she marries a normal person with no family history of albinos, what is the chance for Sally's first baby to be a carrier of the recessive allele?
Answer:
2/3 ×2/3× 1/4
Explanation:
Albino is a rare recessive genetic disorder which is characterized by low production of melanin or no melanin production. It is an inheritable disorder can be pass from generation to generation. Since the parent of Sally has no Albino and Sally sisters has, it means there is an history of Albino in the family that make her sister to have. She has 2/ 3 chance of having and the possibility that her first child will have is 1/4 meaning 25% because her hubby has no Albino history in their family.
A variety of factors influence enzyme activity. Substances that bind to the enzyme and interfere with substrate binding or catalysis are inhibitors. Identify the type of inhibition associated with each of the descriptions and examples by classifying each statement as irreversible, competitive, or mixed inhibition.
Answer:
Explanation:
Irreversible inhibitors are inhibitors whose action are not reversible. They function by modifying enzyme in a covalent way leading to the formation of new functional group.
Irreversible inhibitors are specific to certain enzymes. Examples is inhibitor that are suicidal they makes inhibitor reactive.
Competitive inhibition are Inhibitor that are competitive in nature they resemble one of the substrate of the enzyme and are been bind to by mistake. Example is an inhibitor that resemble folate an enzyme substrate. Enzyme therefore binds to the inhibitor assuming its folate because they are identical.
The color varieties of sunflower pollen are determined by two interacting loci: A_B_ gives orange pollen, aaB_ gives yellow, and _ _bb produces cream colored. Assume that two fully heterozygous plants are crossed. Give the phenotypes (with frequencies) of the offspring. What type of gene interaction would account for these results?
Answer:
This is an illustration of epistasis type of gene interaction.
Explanation:
On crossing AaBb * AaBb, the offspring produced are mentioned in the Punnett square given in the attachment below. Based on the Punnett square, the phenotypic ratio will be 9 (orange): 4 (cream) : 3 (yellow).
The given case is an illustration of the epistasis kind of gene interaction. When two or more distinct gene loci take part in the formation of similar phenotype, however, not additively is termed as epistasis, that is, it is the non-allelic association between the alleles situated at a distinct gene locus. In the phenomenon of epistasis, one of the gene loci modifies or masks the phenotype of a second gene locus.
What hormones are produced by the anterior pituitary?
Answer:
The following hormones are secreted
Explanation:
Adrenocorticotrophic hormone (ACTH)
Thyroid-stimulating hormone (TSH)
Luteinising hormone (LH)
Follicle-stimulating hormone (FSH)
Prolactin (PRL)
Growth hormone (GH)
Melanocyte-stimulating hormone (MSH)
Which step of the scientific method do you perform after you collect data and
observations?
Answer: Draw a conclusion about your hypothesis
Explanation:
If the results match up, then the data supports the hypothesis and thus, the hypothesis itself SUPPORTS the idea that you're studying. Afterward, discuss the experiment with your peers.
Never say that a hypothesis has been proven, because you are not proving anything, it is support.
Given two types of starfish, gold ones and purple ones, that are members of the same species. In your sample area, there are 325 gold starfish and 150 purple starfish (assume purple is dominant)
A. Find the genotype frequencies for "SS", "Ss", & "ss"
B. Find the allele frequencies for "S" (p) & "s" (q)
Answer: I believe I can fly
Explanation:
I believe I can touch the sky.
JK Love you bae
Vhat do scientists need to look at before developing an argument?
The validity of data, claims, hypotheses, and observations.
Their opinion and personal views.
The arguments of famous people on the topic.
The arguments that make the most sense for society.
Answer:
The validity of data, claims, hypotheses, and observations.
Explanation:
Making an argument and discussion over the scientific arguments are considered important to the scientific method.
The argument should be made in a way that it should check the validity of the hypothesis. The scientist who has to make an argument should consider various steps of scientific method like hypothesis which should predict the explanation of the natural phenomenon.
The person should consider the validity of the data whether it supports the hypothesis or not and observation of the experiment.
Thus, the selected option is the correct answer.
Answer:
A
Explanation:
The validity of data, claims, hypotheses, and observations.
edge 2020
1. What were the first living things on Earth?
Answer:
prokaryotes
Explanation:
A stream or river that runs into another stream or river is called a
Answer:
tributary
Explanation:
A tributary is a river that runs into another river.
What happens to grasslands and wetlands as forests are used up?
Answer:
they dry
Explanation:
because forests are sources of rain and without rain wetlands can't have water and grass can't grow n grassland
Answer:
they become really dry good luck men
Examination of a sandstone outcrop reveals an abundance of feldspar and quartz grains. Could this weathered material have come from a nearby basaltic lava flow or a granite outcrop up the road?
The weathered material of a sandstone outcrop revealing an abundance of feldspar and quartz grains would have come from a granite outcrop up the road rather than a nearby basaltic lava flow.
Feldspar is a common mineral found in granite, whereas it is less abundant or absent in basaltic lava flows. Granite is composed primarily of feldspar along with quartz and other minerals. So, the presence of an abundance of feldspar grains suggests a connection to granite rather than basalt.
Quartz is present in both granite and basalt, but it is more commonly associated with granite. Quartz is one of the major constituents of granite, whereas it is generally less abundant in basaltic lava flows. Therefore, the presence of quartz grains does not necessarily differentiate between the two sources but aligns more with the possibility of granite as the origin.
To know more about feldspar, here
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If the current trend continues, can the temperature be expected to increase/decrease or stay the same in the next twenty years? Anssssswer please only 8 minutes left !!!
Answer:
Increase
Explanation:
In experiment #2 you are asked to use the scientific method to develop and execute a method of separating a mixture of sand, salt and iron pellets. Imagine you are in a lab and notice that a plate of bacteria grow faster in the presence of sunlight. After that single observation, you come to the conclusion that sunlight causes bacteria to grow fast. What would be the next step in the scientific method for this experiment?
Answer:
1. separation can be done with help of magnetic bar and filtration.
2. the next step will be testing the hypothesis.
Explanation:
1. Separation of iron pellets from sand, and salt first
Use a magnet
Due to magnetic force iron pallets will attach with it and separation will occur from sand and salt.
After separation of iron pallets, add water to mixture of sand and salt and heat until salt get dissolved then filter the salt water.
This will help in separating all three components of mixture to separate.
2. Bacteria growth
Hypothesis must be tested-
In this case a hypothesis and conclusion is represented. Conclusion is provided that in presence of sunlight growth of bacteria is faster. So the hypothesis must be verified by scientific experiment to be a valid theory by measuring or monitoring growth in presence of sunlight.
What do eukaryotes cells have that prokaryotes do not have
Answer:
Prokaryotic cells are less structured than eukaryotic cells. They have no nucleus; instead their genetic material is free-floating within the cell. They also lack the many membrane-bound organelles found in eukaryotic cells. Thus, prokaryotes have no mitochondria. I hope this helped.
IF YOU DO NOT MIND CAN YOU MARK ME BRAINLIEST?Answer:
true cell
Explanation:
membrane bound organelles such as the nucleus
Animals and dogs Plants absorb ____ from the atmosphere through _____
ASAP PLEASE
1. oxygen
2. nose and roots
Which fossil fuel should be available for the longest time if current usage continues?
What does lung hyperinflation stimulate (write on both lines)
Answer:
What does lung hyperinflation stimulate? ... Dust, smoke, and noxious fumes will stimulate receptors in airways.
Explanation:
please mark me as brainliest i hope this helped you... : D
Which of these factors will affect the friction on a road?
a) Oil
b) Water
c) Ice
d) all of the above
Answer:
all of the above
Explanation:
Oil,Water and Ice
all of these will affect the friction on the road.
hope this helps
brainliest appreciated
good luck! have a nice day!
Answer:
D-all of the above
Explanation:
Force of friction is the force which opposes the motion of an object over a surface
The force of friction acts between the object and the surface.
A ball rolling on ground gradually slows down and comes to rest due to force of friction between the ball and the ground.If we stop pedaling a bicycle, it gradually slows down and comes to a stop due to force of friction between the wheel and the road.Which one ?!!!?!?!?!?!?
Answer:B
Explanation: Mosses are small and usually spreads on the ground like mats thereby avoid direct exposure to sunlight. Palm tree on the other are large and usually grow very tall, hence are expose to maximum sunlight
Identify whether flexion or extension is occurring in the following situations:
1. Intervertebral foramen gets smaller
2. Anterior longitudinal ligament becomes taut .
3. Anterior annulus bulges slightly Spinous processes approximate
4. Facet joints compress
5. Posterior annulus becomes taut
6. Space for nerve roots gets larger
7. Superior vertebral body translates anteriorly
Answer:
Explanation:
1. Intervertebral foramen gets smaller - Extension
2. Anterior longitudinal ligament becomes taut - Flexion
3. Anterior annulus bulges slightly Spinous processes approximate - Flexion
4. Facet joints compress - Extension
5. Posterior annulus becomes taut - Extension
6. Space for nerve roots gets larger - extension
7. Superior vertebral body translates anteriorly - flexion
Does specific heat also mean the amount of energy needed for cooling, or is it only energy for heating?
Answer:
yes it does
here is a more clearer explanation
Explanation:
The specific heat capacity of water is 4,200 Joules per kilogram per degree Celsius (J/kg°C). This means that it takes 4,200 J to raise the temperature of 1 kg of water by 1°C.
Some other examples of specific heat capacities are:
Material Specific heat capacity (J/kg/°C)
Brick 840
Copper 385
Lead 129
Lead will warm up and cool down fastest because it doesn’t take much energy to change its temperature. Brick will take much longer to heat up and cool down. This is why bricks are sometimes used in storage heaters as they stay warm for a long time. Most heaters are filled with oil (1,800 J/kg°C) or water (4,200 J/kg°C) as these emit a lot of energy as they cool down and, therefore, stay warm for a long time.
The specific heat capacity of a material is the energy required to raise one kilogram (kg) of the material by one degree Celsius (°C).
list and explain the three classes of enzymes
Answer:
Oxidoreductases, transferases and hydrolases are the most abundant forms of enzymes.
Explanation:
Conduct research to find something interesting that proves protists are necessary.
Answer:
The slime molds are important to ecosystems because they act as decomposers which will release nutrients back into the environment. Earth basically depends on protists because they supply oxygen and are critical in the food chain.
What are compounds called that form H+ ions when dissolved in water?
Answer:
Acid
At the simplest definition, an acid is any compound that yields hydrogen ions (H +) or hydronium ions (H 3O +) when dissolved in water. Hydronium ions are really the combination of H + ions and H 2O molecules
Explanation:
The human body’s nervous system is made up of?
Answer:
The central nervous system is made up of the brain and spinal cord.
g One can measure ATP production from isolated mitochondria in vitro (in a test tube). Changing the pH of the solution that the mitochondria are in results in a similar change the pH of the intemembrane space. If the pH of the solution that the isolated mitochondria are in is raised and everything else remains constant, what is the effect on ATP synthesis
Answer:
This will lead to an decreases in the ATPs synthesis. This is because low pH , high acidity favours ATP synthesis, because it increases the proton concentration for electrochemical gradients needed for energy that ATPase enzymes makes used of synthesis of ATPs.
Therefore a rise in the pH(low acidity) lowers protons levels, and therefore reduced electrochemical gradients , with a drop in energy for ATPs synthesis.
Explanation:
What happens to certain nutrient molecules after they pass into muscle cells?
A.
They are replicated in the nucleus
B.
They are acted on by enzymes and release the energy they contain.
c.
They are changed into tissues and organs in the cytoplasm.
D.
They enter chloroplasts, where they can absorb light energy.
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Answer:
B. They are acted on by enzymes and release the energy they contain.
Explanation:
Muscles need energy to function thus these molecules make their way into muscles where enzymes act on them to release the energy, energy will likely be ATP.
