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Vinil7 [7]
3 years ago
5

Over the past 60 years, many amphibian species have experienced significant population declines and some species have become ext

inct. Scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. However, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. These global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. In Switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. Some biologists urge the collection of the few remaining individuals of some of the most threatened amphibian species, to preserve them if they become extinct in the wild. If such captive breeding programs could produce thousands of individuals from just a few of the remaining survivors, the species will still be threatened because of ______.
Biology
1 answer:
ollegr [7]3 years ago
5 0

Answer:

a bottleneck effect

Explanation:

Genetic drift refers to the change in the allele frequencies in a population due to chance (random) events. The bottleneck effect, also known as population bottleneck, can be defined as a severe case of genetic drift caused by a drastic reduction in the population size. The bottleneck effect is well known to cause the loss of important genetic variation since alleles that were present in the original population are lost, thereby limiting its genetic diversity. One of the most common causes that may lead to a population bottleneck in a natural population is environmental disasters (e.g., earthquakes, floods, etc).

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Answer:

Tuj1 induces expression of the TauEGFP protein. Tuj1 is expressed in fibroblasts and neurons. Tuj1 is an early marker of neural differentiation.

6 0
3 years ago
What happens if you don't get your wisdom teeth out?
Blababa [14]
Some wisdom teeth is completely unharmful, as long as your mouth have enough space for it to grow healthy and you are sure that you can clean it properly, they make no problems.

However, if your mouth is too small, wisdoms teeth may grow in a tilted angle, this is big problem indeed. It may cause damage to other teeth since it doesn't grow upright. In addition, it may be a big problem to clean it properly so tooth decay may occur.

Therefore, it's better to visit the dentist and see if your wisdom teeth cause problem and whether you need to remove them or not.
8 0
3 years ago
How is the law of conservation of mass applied to ecology?
Thepotemich [5.8K]

In ecology, the law of conservation of mass is applied by the principle of taking energy from the lower trophic levels and passing it to the higher trophic level by any means.

<h3>What is the law of conservation of mass?</h3>

The law of conservation of mass states that the actual mass in an ecosystem is neither created nor destroyed. Overall remains constant in a system.

In ecology, it illustrates that when an organism is ingested by other organisms, its mass is conserved. Some of the organisms may also be dependent on the waste products like urine and feces to make proteins and other compounds.  

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To learn more about Ecological principles, refer to the link:

brainly.com/question/7413811

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7 0
1 year ago
In the summer, laboratories can become hot and stuffy. Is it appropriate to wear flip-flops or sandals to lab to keep cooler?
ANEK [815]
No, incase a chemical spills on your foot.
8 0
3 years ago
Read 2 more answers
Indicate the phenotypic ratio of crossing the offspring of the agouti and chinchilla.
devlian [24]

Answer:

Option A is correct.

Explanation:

Phenotype ratio is the number of one phenotype compared to another phenotype.( physical characteristics)

C/cch * C/c

4 0
3 years ago
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