The spindle apparatus is made of
a. Golgi bodies.
b. microtubules.
c. endoplasmic reticulum.
d. nucleoprotein.
e. chromatids.
B
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What is true about the operation of gills in water? Check all that apply.
_____ Water can support delicate gill structures. _____ Most bony fish actively pump water over their gills. _____ Keeping membranes moist does not require a separate mechanism. _____ Water carries more oxygen than air, so gills must be more efficient than lungs. _____ Gills have evolved many times. _____ Gills take different forms in different animals.
Two snakes that have similar bright color patterns are exhibit aposematic coloration
Indicate whether the statement is true or false.
The ____ regulates the movement of molecules in and out of the cell
a. nucleus b. cytoplasm c. cystol d. plasma membrane e. DNA
Why must mosses live in moist environments?
A) Because they lack a waxy outer layer B) Because they depend on water to reproduce C) Because they grow as a mat D) Because they are pollinated by fish and aquatic insects