BIOLOGY HIGH SCHOOL

Which of the following selection pressures is responsible for the limited evolutionary changes experienced by alligators and other crocodilians?a.

stabilizing selection


b.

directional selection


c.

disruptive selection


d.

high mutation rate

Answers

Answer 1
Answer: The answer is a. stabilizing selection. This is the correct answer because genetic phenotype's among alligators and crocodiles were conserved during the evolution of the species. The reptiles have very little phenotypic variation or difference in physical traits, which would is the result of a stabilizing genetic selection process.
Answer 2
Answer:

Answer:

A

Explanation:

I was taking the test earlier

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what have scientist learned about the classification of amphibians, birds, and reptiles by studying their evolutionary relationships?

Answers

Scientists learned many things in studying and defining organisms or animals into group. The study behind this is called Taxonomy. This study is responsible for the classification of amphibians, birds, and reptiles. The study learned about the evolutionary relationships between the living and extinct organisms.

Answer:

Reptiles are more closely related to birds than amphibians.  Reptiles and birds are so closely related that according to modern classification, they are part of the same group.

Explanation:

The __________ in a bridged network will be the source of the greatest loss in the transmission.

Answers

Answer;

Free Space Path Loss

The Free Space Path Loss in a bridged network will be the source of the greatest loss in the transmission.

Explanation;

-Free-space path loss (FSPL) is the loss in signal strength of an electromagnetic wave that would result from a line-of-sight path through free space (usually air), with no obstacles nearby to cause reflection or diffraction.

-Free-space path loss is proportional to the square of the distance between the transmitter and receiver, and also proportional to the square of the frequency of the radio signal. This value is usually calculated by discounting any obstacles or reflections that might occur in its path.

Final answer:

The network bridge can be the source of the greatest loss in a network's transmission. It can cause delays due to processing times and data queueing. However, impacts are usually minute and can be mitigated with advanced technologies.

Explanation:

In a bridged network, the source of the greatest loss in transmission can generally be attributed to the network bridge itself. This is because the network bridge operates by receiving, processing, and forwarding data from one network segment to others. During this process, the bridge may produce delays, also known as latency. This latency is caused by factors like processing times and data queueing, which could potentially result in a loss in transmission.

The impact of this loss is usually minute and almost imperceptible in smaller networks but can become more significant as the size and complexity of the network increase. Bridging technologies have evolved significantly to mitigate this impact, for example, by using intelligent forwarding algorithms and advanced hardware capabilities.

Learn more about Network Bridge here:

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The two main processes by which plant cells absorb release and use energy are

Answers

Photosynthesis & Respiration.

Just had this question on a test, you forgot the multiple choices. :-)

Why are women often carriers of X-linked traits but rarely affected by them?

Answers

Women have two x chromosomes, compared to men who have one x and one y chromosome. Because of the two x chromosomes, one of them can override the other. In men they only have one x and one y, they don't have the extra x chromosome to override the allele.
Women have two X chromosomes.Recessive alleles on one X chromosome are often masked by dominant alleles on the other chromosome.Women will not be affected unless they receive two recessive alleles.

Classify as man-made or natural extinction: PollutionNatural extinction
Man-made
Neither
Both

Answers

both because things like car emissions are man made but wild forest fires are natural but the smoke causes pollution as well

Answer: The answer is B), Man-made.

Explanation:

All of the following prevent pathogens from entering the human body excepta. red blood cells
b. tears
c. mucus
d. skin

Answers

Red blood cells-(a)they carry oxygen around the body not protect from pathogens
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