Root nodules found on the roots of leguminous

plants are involved in supplying which element
for the plant?



a. aluminum
b. boron
c. magnesium
d. nitrogen
e. chlorine


D

Biology & Microbiology

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In the biological species concept, it is specified that two organisms are of the same species if they

breed and

a. are unsuccessful in producing offspring. b. produce any offspring. c. produce fertile offspring under laboratory conditions only. d. produce fertile offspring under normal circumstances. e. produce infertile offspring.

Biology & Microbiology

These structures are required for chromosome replication; they protect the chromosome from being destroyed by dangerous DNAase enzymes, and they keep chromosomes from bonding to one another end to end. 

A. telomeres B. nucleoproteins C. histones D. nucleotides

Biology & Microbiology

Individuals using drugs such as cocaine over extended periods of time find that they need increasing amounts just to feel okay. Why?

What will be an ideal response?

Biology & Microbiology

Australopithecus africanusis older (earlier) than Australopithecus afarensis

a. true b. false

Biology & Microbiology