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guapka [62]
4 years ago
14

How is HIV is a modern-day driving force for human evolution?

Biology
1 answer:
juin [17]4 years ago
4 0

Answer:

Testing positive for HIV means a high chance of death and a good chance of lower reproduction rates. But some people are immune to HIV, which makes them more evolutionarily fit, likely to live longer, likely to reproduce more, which would increase the frequency of the immune allele in the population. Over time, this increase in frequency of the gene that causes immunity could spread across the human race and cause it to evolve.

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krek1111 [17]
The equator receives about the same amount of sunlight all year long. 
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3 years ago
Read 2 more answers
The rate of a chemical reaction is dependent upon?
irina [24]

Explanation:

Reactions occur when two reactant molecules effectively collide, each having minimum energy and correct orientation. Reactant concentration, the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.

6 0
3 years ago
Select the correct statement(s):
expeople1 [14]

Answer:

The correct option is B <em>Pressure-sensitive baroreceptors uses tonic receptors which adapt slowly to the stimulus</em>

Explanation:

a. The thalamus receives stimulus from all of the five senses (sight, smell, taste, hear, touch). FALSE. Olfactory information is not sent to the thalamus for its process. The rest is.  

b. Pressure-sensitive baroreceptors uses tonic receptors which adapt slowly to the stimulus. TRUE. Among the different types of tonic receptors, we may find baroreceptors, irritation receptors, tactile receptors, and proprioceptors. Tonic receptors characterize by their slow adaptation to the stimulus. The first discharge is maximal when the stimulus is received and then it progressively decreases. They send a continuous signal to the CNS.

c. The three layers that the retina is made of: photoreceptors, bipolar cells, rod cells. FALSE. There are in fact three layers in the retina: photoreceptors, bipolar cells, and ganglion cell layers. NOT rod cells.  

d. The sense of smell uses phasic receptors which continuously fire as long as the stimulus is present. FALSE. Olfactive sense uses phasic receptors, but not continuously. These receptors shoot when they receive the stimulus, and then cease if the stimulus keeps constant.

6 0
3 years ago
In butterflies, black wings are dominant over yellow wings. Use the Punnett Square to determine the possible genotypes and pheno
SVEN [57.7K]

The genotypes are one BB, two Bb, and one bb and the phenotype is three black and one yellow wing butterfly.

<h3>What are the genotype and phenotypes of the offspring?</h3>

The genotype and phenotypes of the offspring are determined using a Punnett square as follows:

Let B be black wing and b be yellow wings.

The cross between two heterozygous butterflies is:

  • Bb × Bb = BB, Bb,Bb, bb

Black is dominant over yellow wings.

Therefore, the genotypes are one BB, two Bb, and one bb and the phenotype is three black and one yellow wing butterfly.

Learn more about genotype and phenotype at: https://brainly.in/question/2477999

#SPJ1

8 0
2 years ago
What was changed to test viscosity In the "Viscosity" lab?
ziro4ka [17]

Answer:

A: temperature

Explanation:

In a Viscosity lab, Temperature change affects the test of viscosity. This is because an increase in temperature leads to increase in rates of  molecules  interchanging, thus molecules moves faster with higher temperatures.

Hope it helps,mark as Brainliest!!

7 0
3 years ago
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