Which of the following is true of tetrads?

A. They exist throughout the process of meiosis.

B. They are found only in haploid cells.

C. They also form in cells undergoing mitosis.

D. They separate during meiosis I.

Supplies the diaphragm

Northern elephant seals have reduced genetic variation because of a population bottleneck inflicted on them in the 1890's by humans. Hunting reduced their population size to 20 individuals at the end of the 19th century.

What role do genetic factors play in causing birth defects?

What happens when two moving objects collide?

A sensory receptor is a neuron that reacts directly to a stimulus from the environment. true or false.

What has to be properly functioning in a unicellular organism for homeostasis to be maintained.

How many cells make up a unicellular organism? one two three more than three

The researcher thinks the changes in data are a result of selection. Do you think directional, disruptive, or stabilizing selection is occurring? How does your data support this conclusion?

Which of the following is a valid reason why a scientist might reject a scientific theory?

Do pathologists take blood from the heart to check for bacteria in the blood?