The head of a sperm is capped with an organelle that contains glycoprotein-digesting enzymes. This organelle is the...
A. zona pellucida.
B. acrosome.
C. granulosa.
D. neural cap.
Ans: B. acrosome.
You might also like to view...
Why are hydrocarbons insoluble in water?
A) The majority of their bonds are polar covalent carbon-to-hydrogen linkages. B) The majority of their bonds are nonpolar covalent carbon-to-hydrogen linkages. C) They are hydrophilic. D) They exhibit considerable molecular complexity and diversity. E) They are less dense than water.
How might a plant cell compensate for the excessive membrane fluidity that occurs during prolonged exposures to elevated temperature?
A. Reduce membrane cholesterol content. B. Alter the lipid composition to have longer phospholipid tails and fewer double bonds. C. Alter the lipid composition to have shorter phospholipid tails and more double bonds. D. Alter the lipid composition to have shorter and more unsaturated phospholipid tails. E. Reduce cholesterol content and alter the lipid composition to have shorter phospholipid tails.
All of the orbitals shown in the neon atom in the figure are completely filled with electrons. How
many electrons does this neon atom have?
a. 5 b. 6 c. 8 d. 10 e. 16
Which of the following describes primary succession?
a. succession on land that previously had no life
b. succession that moves a community away from equilibrium
c. succession in response to a natural disturbance
d. succession characterized by equilibrium