What is altruism?

A. Acts that cost the actor but do not benefit another
B. Acts that cost the actor and benefit another
C. Acts that do not cost the actor and do not benefit another
D. Acts that do not cost the actor and benefit another


Answer: B. Acts that cost the actor and benefit another

Biology & Microbiology

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Which of the following has identical molecular formulas but different structures and characteristics?

A. isomers B. sterioisomers C. enantiomers D. isomers, but not sterioisomers E. isomers, sterioisomers, and enantiomers

Biology & Microbiology

Cell differentiation of a pre-embryo begins

A) immediately upon the first division of the fertilized egg. B) after the 32-cell stage. C) after the 4-cell stage. D) after the 8-cell stage. E) after the 2-cell stage.

Biology & Microbiology

Pigments absorb wavelengths of light from all ranges of the electromagnetic spectrum

a. true b. false

Biology & Microbiology

____ is an element that is abundant in Earth's atmosphere; however, usable forms of this element (such as ammonia) are comparatively rare in certain soils. To circumvent this problem, soybean plants form symbiotic relationships with bacteria

Fill in the blank with the appropriate word.

Biology & Microbiology