Which one of the following is the earliest event in the process of fertilization?
A) Sperm contact the jelly coat around the egg.
B) The sperm head plasma membrane fuses with the egg plasma membrane.
C) Enzymes from the acrosome are released.
D) The sperm nucleus enters the cytoplasm of the egg.
A
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Substances called ________ donate hydrogen ions as they dissolve in water, lowering the pH of the solution
a. acids b. bases c. solvents d. salts
When Mendel crossed a true-breeding purple-flowered pea plant with a true-breeding white-flowered one, ________% of the offspring was white
a. 100 b. 50 c. 0 d. 25
Differential changes in phenology can result in a ________ of timing between herbivores and their resource
Fill in the blank(s) with correct word
The X-ray diffraction studies of the scientists named ________ and ________ were essential for the discovery of the structure of the DNA molecule
Fill in the blank(s) with correct word