What is the largest suspected environmental problem associated with the burning of fossil fuels? A) global warming B) depletion of ozone C) production of acid rain D) pollution of water sources

What type of fault is formed when the plates diverge, or pull apart? What type of fault is formed when plates are pushed together?

A blastula is a. the innermost germ layer. b. a hollow ball of cells in an embryo. c. a digestive organ. d. a stage of development before a zygote.

Use the figures to select the best definition of polyglob. a polyglob has three solid-colored dots, three legs, and a colored body. a polyglob has three circles and three legs. a polyglob has three solid-colored dots and three legs.

What is the purpose of the first three phases of human testing? A. to demonstrate that people want to take the drug B. to explain how a drug is expected to treat a condition C. to establish that a drug is both safe and effective D.

Mitochondria are thought to be the descendants of certain alpha-proteobacteria. They are, however, no longer able to lead independent lives because most genes originally present on their chromosome have moved to the nuclear genome.

How do guard cells work in leaves?

What is the process used for mRNA to amino acids

How many parents are required for asexual reproduction

A complex of interconnected food chains in an ecosystem is called a/an A. trophic stack. B. food web. C. ecosystem. D. ecological pyramid.

Explain (in your own words) how blood flows through the heart and throughout the body.