In order to explain how the first eukaryotic cells may have evolved, scientists proposed the

A. theory of solar nebula.

B. theory of spontaneous generation.

C. theory of endosymbiosis.

D. theory of autotropic evolution.

13. The allele that results in the absence of a tail is autosomal recessive. From which parent do dogs with no tail inherit this allele? a) Both parents b) Father only c) Mother only d) Neither parents

The hepatic portal vein is formed by the union of the superior mesenteric vein and the

This is broken off of ATP to release energy to a sell ... ?

Explain why air pressure decreases as we go up in altitude

Which of the following is not one of the reasons to properly warm up before exercising? a) develop overall flexibility b) increase blood flow to the muscles and increase body temp c) return heart rate to resting levels d) prevent injuries such as

Which best explains how the body maintains homeostais? A. All systems work together to match the external environment B. All systems work together to stabilize the body C. Each system works interdependently to stabilize the body D.

It is an effect that drug use can have on society? A. Drug use increases pollution. B. Drug use leads to an increase in criminal activity. C. Drug use increases the spread of disease. D. All of the above

Which of the following affects the speed of light waves in a material? Angle at which the ray strikes the medium Color of the material Density of the material Temperature of the light wave

What does the nosepiece do on a microscope

What does a scale measure