How is the process of fertilization in animals like the process that takes place in plants? a. a sperm cell and an egg cell combine to form an embryo. b. sperm is encased in a grain of pollen to travel to an egg. c. spores can become sperm that will fertilize the egg. d. self-fertilization is possible if no partner is available.

The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?

In a cladogram' when does a group of organisms branch off

Awire-hair terrier and a smooth-hair terrier are mated. the offspring produced are 6 wire-hair puppies and 2 smooth-hair puppies. a. what pattern of inheritance best describes this situation? b. what is the genotype(s) of the wire-haired puppies? of the smooth-haired puppies? c. what would be the expected genotype and phenotype ratios of a mating between 2 wire-haired terriers that are heterozygous?