In the life cycle of the brown alga Laminaria, which stage represents the young sporophyte?

1.A
2.B
3.C
4.D
5.E
4

Biology & Microbiology

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You observe a tissue with one free surface with several layers of cells attached to a basal lamina. This

is an example of

a. connective tissue. b. epithelial tissue. c. muscle tissue. d. nervous tissue. e. connective and muscle tissue.

Biology & Microbiology

What initiates the extrinsic clotting mechanism?

a. activation of thrombin b. release of substances outside of the blood c. aspirin d. conversion fibrinogen to fibrin e. activation of factor X

Biology & Microbiology

Which characteristic differentiates hagfishes from other craniates?

A) Bony jaws B) Lobe-like fins C) Two-chambered hearts D) A lack of gills E) Skeletal elements surrounding the nerve cord

Biology & Microbiology

Tundra is characterized by:

A) low rainfall, dry soils, and permafrost. B) low rainfall, seasonally wet soils, and permafrost. C) high rainfall, slowly growing trees, and low temperatures. D) low rainfall, deep water penetration, and trees with a vibrant understory of moss. E) low rainfall, coniferous trees, and permafrost.

Biology & Microbiology