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meriva
3 years ago
14

Genetic drift and natural selection only take place if there is

Biology
1 answer:
Pavlova-9 [17]3 years ago
4 0

Answer:

Genetic variation  

Explanation:

Drift and natural selection are natural phenomena that occur when there exists genetic variation. In the first case (drift), the consequence will be the decrease in the genetic diversity, while natural selection will change the allele frequencies in order to favor adaptive genetic differentiation

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WHAT IS THE FUNCTION OF EACH OF THE FOLLOWING PARTS OF THE COMPOUND AND DISSECTING MICROSCOPE
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Answer:

microscope parts and functions

Explanation:

no explanation for this

4 0
2 years ago
Which terms complete the sentence given below?
Paha777 [63]

Predators are the keystone species because they limit the population of prey.

<h3><u>Explanation:</u></h3>

Predators are those species which hunt for other animals to consume them as food and live. Where prey are those animals who are being hunted and killed by predators.

Keystone species are those species whose absence or removal from a ecosystem will greatly reduce the diversity from the ecosystem to a huge extent.

Now, if a predator like lion is eliminated from the ecosystem, then the prey like deer, goats etc in the ecosystem will live and reproduce at a very high rate, which will greatly increase the population density of these species. So the food for them will be killed at a very high rate, decreasing the plant varieties and population. So the overall diversity in the ecosystem will be highly reduced.

So the predators like lions, tigers, etc are the keystone species of an ecosystem.

7 0
3 years ago
If the blue eyed kid has brown eyed parents what is their genotype
Sloan [31]
BB or Bb because brown eyes are dominant and blue eyes are recessive.
8 0
3 years ago
18.) When and by whom was the idea of a spherical Earth first
Natasha2012 [34]
300 BC by Greek philosophers
7 0
3 years ago
Syntenic genes can assort independently when:_________.
Arturiano [62]

Answer:

4.

Explanation:

Synteny oe syntenic gene is defined as the physical co-localization of genetic loci on the same chromosome within a speciesand inidvidual.

In the beginning of the meiosis process, when genes are present in the same chromosomes but very far, they undergo indepedent assort due to homologous recombination and the random exchnage of matching fragment in  homologous chromosomes takes place. During the crossing over there are very less chances that all types of gametes are produced accurate frequency.

Hence, the correct answer is 4.

7 0
3 years ago
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