Why do plant cells have both chloroplasts and mitochondria?

In an ocean ecosystem, seabirds are predators of fish. What would happen to the balance of an ocean ecosystem if the number of seabirds decreased? A. The population of fish in the ecosystem would increase. B.

A flea is a tiny wingless insect with a flat body designed to easily navigate through animal hair. Fleas tend to live on furred mammals and have mouth parts designed to suck blood from these mammals.

How do scientists believe our atmosphere was formed?

Many different types of mutations can occur within the body. Sickle cell anemia is a disease that occurs when a mutation in a base pair of the hemoglobin beta gene causes a single replacement of the amino acid glutamic acid by the amino acid valine.

What are 5 types of evidence for evolution

How can researchers distinguish exons from introns in a segment of DNA? a. The sequence of exons complements mRNA molecules in the cell. b. Only exons contain three-base sequences that can code for amino acids. c. Primers won't bind to introns. d.

Factors for which organisms are competing in a given habitat

Gene mutations can best be described as changes in the

Crustaceans are well adapted to life on the rocky shore because they have? A) Soft shells B) Internal skeletons C) Camouflaged color patterns D) Holdfasts

Which of these is an organism? a herd of sheep a wolf a drop of water a heart