A complex of interconnected food chains in an ecosystem is called a/an

A. trophic stack.

B. food web.

C. ecosystem.

D. ecological pyramid.

Which could be referred to as secondary growth of stems? A. Growth at the ends of the stem B. An increase in the width of the stem C. An increase in the length of the internodes

If the primary gear ratio in a drill is 4:1 and secondary gear ratio is also 4:1 what is the overall gear ratio of the drill

Is the following sentence true or false? In the troposphere, the temperature increases as the altitude increases.

All of the following are considered plant-like protists except a. euglenoids. b. algae. c. amoebas. d. diatoms.

the environment and adaptations of ostriches to explain how they evolved to survive in their environment.

What does the Magnuson Stevens Act deal with? A. setting up of marine sanctuaries B. prevention of overfishing C. regulating disposal of materials into the ocean D. protection of marine mammals

In addition to a thicker stratum corneum and the presence of a stratum lucidum, the thick skin of the palms and fingertips of the hands and of the soles of the feet have a denser array of sense receptors than thinner skin found elsewhere on the

Which of the following theories sees aging as a process whereby cells are assumed to have a limitation on the number of times they can reproduce to repair damage? a. wear-and-tear theory b. cellular clock theory c. activity theory d.

In humans, oculocutaneous (OCA) albinism is a collection of autosomal recessive disorders characterized by an absence of the pigment melanin in skin, hair, and eyes. That is, normal pigmentation (A) is dominant over albino characteristics.

How can a layer of rock containing a fossils could be present in a mountain wall that is several thousand feet above sea level