In a woody stem, cork cambium ... ?

A. forms phloem by producing sieve tubes

B. forms xylem by producing vessel cells

C. produces the cells of the outer bark

D. becomes vascular cambium

When a person is active most of the body heat is generated in the brain heart and endocrine glands?

What is the connection between poverty and soil erosion in developing countries?

During what part of the water cycle does a liquid turn into a gas

What is the name of the five kigdoms of living things

Why was it more likely that rna was the first genetic material?

Which route represents the path taken by the European explorer Christopher Columbus? A) 1 B) 2 C) 3 D) 4

Which gas is the most abundant of the trace gases? A. nitrogen B. oxygen C. argon D. carbon dioxide

Describe the central dogma of molecular biology, briefly describe the processes of transcription and translation.

magine that the animal body produced sperm and eggs with mitosis instead of meiosis. What chromosome number would the autosomes of the third generation have if the first generation had four chromosomes

A well supported testable explanation of phenomena that have occurred in the natural world is called