Identical twins are born, when

[A] Two sperms fertilize two ova[B] Two sperms fertilize one ovum[C] One sperm fertilize one ovum[D] One sperm fertilize one ovum. Zygote cleaves into two cells that develop independently.

Digestive enzymes break down these complex molecules into smaller molecules the body can use. What would happen if digestive enzymes were not present?

What are the four factors demographers look at to determine population size

Choose the correct levels of organization in multi-cellular organisms from smallest to largest

When explaining how carbon dioxide combines with water to form carbonic acid as part of an acid-base lecture, the faculty instructor emphasizes that which enzyme is needed as a catalyst for this reaction?

What does the name of an enzyme usually end in?

In what two places on plants do seed grow?

Which statement describes gravity? Check all that apply There is no defined unit of measurement for gravity Gravity is the force that pulls objects toward Earth's center Objects that have a small mass will have no gravitational pull Gravitational

Which statement about crustaceans is true? * (A) all have the same number of appendages (B) all have an internal skeleton (C) all have an exoskeleton (D) only some have jointed appendages

5. The measurement of the amount of friction a surface will generate is called the of friction'.

How much of earth's air is made of Nitrogen?