A ____ forest included low swamps with giant ferns, horsetails, club mosses, seed ferns, and early gymnosperms

a. Jurassic
b. Silurian
c. Devonian


d. Ordovician
e. Carboniferous


e

Biology & Microbiology

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Steroids are considered to be lipids because they _____

A) are essential components of cell membranes B) are not soluble in water C) are made of fatty acids D) contribute to atherosclerosis

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Many species are held below the environmental carrying capacity by predation.

Answer the following statement true (T) or false (F)

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________ cells in leaves are specialized for photosynthesis

A) Stomata B) Mesophyll C) Vein

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