Graph shows the buffalo population from 1958 to 2014 15,000
12,000
9,000
Population Size
6,000
3,000
0
E0961
E8961
FQ261
ESZ6T
Year
Buffalo are herbivores that feed on grasses. In which time frame did a drought likely
cause a change in the buffalo population?
A 1973-1978
B 1982-1987
C 1994-1999
D 2001-2006

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation:

answer; both surfaces of the membrane are nonpermeable