The spindle apparatus is made of

a. Golgi bodies.
b. microtubules.
c. endoplasmic reticulum.
d. nucleoprotein.
e. chromatids.


B

Biology & Microbiology

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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.

Biology & Microbiology

Two snakes that have similar bright color patterns are exhibit aposematic coloration

Indicate whether the statement is true or false.

Biology & Microbiology

The ____ regulates the movement of molecules in and out of the cell

a. nucleus b. cytoplasm c. cystol d. plasma membrane e. DNA

Biology & Microbiology

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

Biology & Microbiology