Conception is defined as the moment when the
a. egg is fertilized by a sperm.
b. ovum undergoes its first cell division.
c. sperm enters the fallopian tube.
d. ovary encounters a sperm.
Question 2
Which best exemplifies the process of cultural evolution?
a. The fact that different eye shapes are found within individuals in the same ethnic group
b. Inheriting a stronger left arm than a right arm because in the past, this allowed for the faster cutting of grains and more food for families
c. The dramatic shift from Communism to Democracy seen in the Soviet Union in the 1980s
d. Greater height in current generations than in past generations because in past generations, food that needed to be gathered was closer to the ground
The "Emu in the sky," a constellation defined by dark clouds rather than the stars.
Tertiary structure of sperm whale myoglobin
Artist's conception of the New Horizons spacecraft passing over Pluto, showing its tenuous atmo
Sperm and Egg Cells Fusing
A comparison of sperm production and egg production in humans
Structure of a mature sperm, a male gamete.