Scientists have found that the carbon-14 content of an unknown prehistoric sample was reduced to one-half. What best describes the identity of the sample?

Which of the following is MOST closely related to the number of different species found in an environment? A. biology B. biomes C. biospheres D. biodiversity

How many chromosomes did each of your daughter cells contain?

It is important to have a source of good drinking water. Water found underground is referred to as ground water Give one reason why there is less bacteria and particle pollution in ground water than in water from surface sources such as lakes and

What is the first category of food macromolecules to be chemically digested by enzymes in the human mouth? question 4 options: a. nucleic acids b. membranes c. carbohydrates d. lipids e. proteins?

Describe the three steps of the lock and key model of enzyme function.

What is a population?

In what way is cytokinesis in plant cells similar to binary fission in a bacterium? All of these choices are correct. A microtubule-like structure constricts the plasma membrane between the two nuclei to separate the daughter cells.

Which statement describes the ability of the cell membrane to allow various substances to move through it? a) The cell membrane is selectively permeable. b) The cell membrane id composed of lipids and phosphates.

What are the potential consequences if a person has their gallbladder removed?

What must change in the ecosystem for tree to appear