Orange roughy fish are a fourth-level consumer. We may see fifth - or sixth-level consumers, but not as many as at lower levels on a trophic pyramid. Why are the upper levels of a tropic pyramid limited?

Which of the following statements regarding glycolysis is FALSE? a. Glycolysis does not require compartmentalization by internal membranes. b. Glycolysis is the most widespread metabolic pathway found in Earth's life. c.

Which best describes the alternation of generations? Fertilization produces haploid spores. Meiosis produces a diploid zygote. A gametophyte is a diploid phase. A gametophyte is a haploid phase.

Which best explains what would happen to the immune system if the excretory system broke down? A. Infections caused by increased wastes in the body would take over healthy cells. B.

How is the location of chloroplasts consistent with the function of leaves?

A/an is a type of cancer that occurs in blood-making cells of the red bone marrow.

A human ingests a tapeworm. The tapeworm lives in the human's intestines and absorbs nutrients, preventing the human from receiving vital nutrition. Which type of organism is the tapeworm? decomposer host parasite predator

Genetic mutations pass to offspring in gametes because gametes A) are not germ cells. B) make up all internal organs. C) do not divide during mitosis. D) fuse during sexual reproduction.

How can you tell that a sperm cell is animal cell and not a plant cell?

The all-or-nothing principle means that a. All the nerve impulses go to the brain b. An entire neuron depolarizes to its maximum strength c. All the potassium ions on one side of the cell membrane move to the other side of the cell membrane d.

Saki went on vacation and was fortunate enough to get to see the aurora australis. What solar activity did she observe?