How do identical twin forms

a. two eggs are fertilized by one sperm

b. a fertilized egg splits in two

c. two eggs are fertilized by two sperm

d. two sperm fertilized an egg

If you were to travel from the surface to the center of Earth, the temperature would A) increase minimally. B) stay about the same. C) increase dramatically. D) decrease dramatically.

What word or two-word phrase best describes the shape of the phosphorus tribromide (pbr3) molecule?

Intrutrusive rocks are formed when magma is squeezed in between other rocks. True or False

Mitotic cell divisions of a zygote lead to the formation of a fluid-filled ball of cells called a blastula. a. True b. False

29. Serum-separating tubes or tiger-striped tubes contain: a. Heparin b. EDTA C. O No additives d. O Clot enhancers

Who compiled the laws of the roman empire into easy-to-understand codes?

What are some top predators in arazona

Why are theories modified over time?

Living organisms do not play a role in the water cycle. True Or false?

Why are shellfish population often a good indicator of water quality