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

Is it mitosis or meiosis that produces genetically identical cells

The jawed fish and all other vertebrates are gnathostomes, which means they have

In a hypothetical environment, fishes called pike-cichlids are visual predators of algae-eating fish, i. e., they locate their prey by sight.

Combinatorial control of gene expression a. involves every gene using a different combination of transcriptional regulators for its proper expression. b. is seen only when genes are arranged in operons. c.

Unicellular has a cell wall single chromosome

What are earthquakes?

During which trimester is the fetus most susceptible to the detrimental effects of alcohol on its development? a. first b. second c. third d. risk is equal during all stages of development.

What are some structural explanation for why animal and plant cells differ in response to changes in the extracellular space?

Which teeth are used for tearing food apart and are obvious in meat-eating animals?

If bluefish contains 0.336 ppm of mercury (that is, 0.336 oz of mercury per 1 * 10 6 oz of fish), how many ounces of mercury would a pregnant woman consume in a month if she ate the maximum recommended amount of bluefish?