Acell shows formation of a contractile ring just prior to cytoplasmic division.

which cell is being observed?

a. onion root tip cell

b. leaf cell

c. human fetal cell

What claim did thorne make? what evidence supported his claim?

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that a) the four organisms do not have a common ancestor. b) humans are more closely related to chimps than any other apes. c) chimps are more closely related to gorillas than they are to humans. eliminate d) there is no evidence if any relationship between the four branches on the tree.