PLZZZ HELP ME A large population of ground squirrels were separated over time by the Grand Canyon, eventually creating two new species.

Giraffes with longer necks are able to reach more food, live longer, and pass on long necks to more babies.

Arctic foxes have developed two-layered fur coats; a white layer for the extra cold winters and a thinner, brown layer for the short summers.

A flood washes away most of a population of field mice. Only those who lived in the roots of trees survived to pass on their genes.

UV radiation causes a mistake in a gene; changing one letter in the DNA code and causing a new eye color.

1.
Natural Selection

2.
Mutation

3.
Adaptation

4.
Genetic Drift

5.
Evolution

1. Genetic drift

2. Natural selection

3. Adaption

4. Mutation

Explanation:

I'm not entirely sure that this is all correct, but for 2. Natural selection makes sense, and for the foxes that is adaption. I'm unsure about the first question though.

Hope this helps you a bit. Good luck on your studies.

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:

they absorb it i think

not sure

you