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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The excretory system used by most annelids and adult mollusks consists of tubules called
a. nephrons. b. hepatic tubules. c. metanephridia. d. Malpighian tubules. e. protonephridia.
Biology & Microbiology
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
Biology & Microbiology
Many species are held below the environmental carrying capacity by predation.
Answer the following statement true (T) or false (F)
Biology & Microbiology
________ cells in leaves are specialized for photosynthesis
A) Stomata B) Mesophyll C) Vein
Biology & Microbiology