They lack chloroplasts, but have thylakoid membranes, and are thought to have been among the first organisms on Earth.

An adaptation is an inherited characteristic that can be

Which conclusions can be made about the animals of each class based on the structural similarities of the embryos? Select ALL the correct answers. 1. There is an evolutionary link among the classes. 2.

When a person is not feeling well a doctor may examine samples of the person's blood to see how many white blood cells are present why would this information be useful?

When a duck dives into cold water, the capillaries in its skin constrict and move deeper below the surface of the skin. This reaction is an example of 1. transporting nutrients2. transporting oxygen3. maintaining homeostasis4. collecting wastes

Which strategy is NOT used in conservation biology? A. Habitat preservation c. Habitat degradation b. Species protection d. Habitat maintenance

What is the functions for chloroplast

How do inbreeding and hybridization compare

A species of gray wolf was eliminated from a national park because of unrestricted hunting. As a result, there was a tremendous increase in the population of its prey, the elk. The populations of other herbivores also increased.

Plant fiber is which type of cell?

The nurse is planning to percuss the back of an adult male client for diaphragmatic excursion. how should the nurse begin the assessment?