Which structure in a cell is composed mainly by proteins and lipids and aids in maintaining homeostasis within a cell? a. cytoplasm b. cell membrane c. nucleolus d. centrosome

One group of reptiles, characterized by the fossil ark metal x

Imagine that a mouse has white fur because of a mutation in its dna. which of the following conclusions can be drawn

How do the sperm cells get from the stigma to the ovules? a. they slide down the petals to the bottom of the flower. b. they travel through pollen tubes. c. they travel along filaments. d. insects carry the sperm cells from the stigma to the ovules.