The endosymbiotic theory provides an explanation for the origin of chloroplast. What trait of chloroplasts supports this explanation

Organisms may contain up to five levels of organization within their bodies which levels of organization is shown by the liver

Karina is looking at a cell under the microscope. it is the only cell in the organism, which has a cell wall and no nucleus or membrane bound organelles. in which kingdom should this organism be classified?

During the initial development stages of cleavage, what are the individual cells called? 1) gametes 2) blastopores 3) blastomeres

What act of Congress described general organic principles that organic farmers, ranchers, and food processors must follow?

What is unusual about the fossils in the Burgess Shale? They show the remains of mountain creatures. Many were transitional fossils. They show that dinosaurs and humans lived at the same time. Many preserved both hard and soft body parts.

2. The heart is classified as a (n)

How long does it take for cocaine to leave out your Stream

Why is the tundra treeless? lack of sufficient water permanently frozen ground winters too harsh too many fires

Select the correct statement about antigens. A. One antigen may have many different antigenic determinants and may therefore cause the formation of more than one antibody. B. Only small antigens exhibit reactivity. C.

Which molecule is the source of basic material used for the production of glucose in the calvin cycle?