This is a mechanism by which organisms maintain homeostasis when the level of one substance influences the level of another substance or the activity of an organ.

The gummy bears not placed in water or salt water serves as a control for comparison.

An rna molecule is looking for a job in a protein synthesis factory. it asks you to write its resume. this rna molecule is not yet specialized and could, with some structural changes, function as mrna, rrna, and trna.

Read the following statements. In maintaining homeostasis, what is the correct order in which they occur? 1) The liver removes glucose from the blood. 2) As the body uses glucose for energy, the liver releases stored glucose into the blood.

The ability of an organism to change internally or externally in relation to changes in the environment is called

A student examined a cell under a microscope and noticed that the cell does not have a nucleus. The student did not observe the cell reproducing and concluded that the cell could not reproduce because it was missing its nucleus.

The hypothesis of continental drift is used to explain an event that happened a. two million years ago. b. two hundred million years ago. c. two billion years ago. d. two hundred billion years ago.

What factors contributed to increased interest in conservation in the 1960s?

True or false photosynthesis occurs in the chloroplast in prokaryotes.

In areas of permafrost, stands of black spruce are frequently observed in the landscape, while other tree species are noticeably absent.

In prenatal development, the head and its features grow in size and differentiation before the neck, shoulders, trunk, and limbs. What is this pattern of development called?