Which scenario is an example of mechanical reproductive isolation?

a. two plants that bloom months apart
b. two flowers that are pollinated by different insects
c. two mammals that have different habitats
d. two fish that have incompatible gametes
e. two birds that have different mating rituals


ANSWER: b

Biology & Microbiology

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Mycorrhizae are a true symbiotic relationship between plants and fungi. What is the primary benefit to the plants?

a. protection from animals that would eat the plant b. additional moisture which protects plants from drought c. access to phosphorus that hyphae can obtain but plant roots cannot d. loosening and aerating the soil

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What system reclaims fluids and proteins that have escaped from blood capillaries?

a. cardiovascular b. pulmonary c. lymphatic d. sinoatrial e. venous

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Nekton are restricted to particular ocean areas by:

What will be an ideal response?

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The process of programmed cell death is

a. exocytosis. b. apoptosis. c. system acquired resistance. d. metastasis. e. unknown.

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