Speciation events that occur when the geographic ranges of the populations involved overlap are termed ________
Fill in the blank(s) with correct word
sympatric
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A line transect would probably be the preferred method to quantify the population density of ______.
A. birds B. lions C. fishes D. trees E. butterflies
Which of the following is not true of the main structural forms of actin?
A) Actin filaments may form a filament network (gel). B) Actin monomers may form actin filaments or G-actin protein complexes. C) Actin filaments are severed to form filament bundles. D) Capped filaments are made from actin filaments. E) Actin filaments form filament bundles.
Which of the following is NOT a characteristic of a morphogen?
A. a morphogen will only elicit effects in areas where it is at a high enough concentration B. morphogens can be distributed asymmetrically throughout a cell C. morphogens can be secreted to act on neighboring cells D. morphogens can cause cell death E. morphogen gradients are always established in the oocyte
The most abundant protein found in the extracellular matrix of animal cells is _____.
-collagen -pectin -cellulose -hemoglobin