During prophase I of meiosis, crossing over between the sister chromatids occurs. What is the purpose of this process?

To produce genetic variation.

To duplicate the DNA.

To remove the nuclear envelope.

To produce the spindle fibers.

Explain why anatomical and molecular features often fit a similar nested pattern. in addition, describe a process that can cause this not to be the case.

John wants to cook some macaroni and cheese, so he puts a pot of water on to boil. However, John notices that it is taking a long time for his water to boil. In order for water to change from a liquid to a gas, it must take on large amounts of heat.

The enzymatic nutrient pathway in the liver for the production of glucose from noncarbohydrate molecules (amino acids or fatty acids) is called

In the metric system of measurement is the unit of work is

In an experiment six people at different places around the earth drop an apple at the same time witch apple will fall to the earth

Carbon-14 has a half life of 5,770 years. A fossil was found that had 1/32 of its original Carbon-14 remaining. How old is the fossil?

Why are many trials taken and averaged in an experiment?

Northern flickers are woodpeckers of the eastern United States. Males, but not females, have black feathers that resemble a moustache extending from the bill along each side of the head.

The following are features of mitosis or meiosis. can you put them in groups. im so confused : allows for transmission of chromosomes to offspring, necessary for growth and regeneration, allows for regeneration of an organism, two identical diploid

Who signs a death certificate