A blastula is

a. the innermost germ layer.

b. a hollow ball of cells in an embryo.

c. a digestive organ.

d. a stage of development before a zygote.

Dominant traits are traits that will be expressed. Recessive traits are traits that are never expressed in the presence of a dominant trait. They can only be expressed when both alleles are recessive. A) True B) Neither C) False D)

What measures did people take to prepare for the storms?

Explain how and why our bodies go to cellular respiration

In the African savanna, more wildebeests are born than the environment can support. What is most likely the result over a period of years? A. The chances for survival of the population are reduced. B.

What kind of vegetation would you most likely expect to find in the chaparral biome? a. deciduous trees b. tall grasses c. hardy shrubs d. tall pine trees

Which of the following is not part of the carbon cycle? -Photosynthesis in plants -Respiration in plants -Evaporation of water from the oceans -Decay of plants

What would happen if a keystone species is removed from an ecosystem

Which material will displace a volume of water? all of them cork and wax iron, lead, and aluminum none of them Which material will displace a volume of water less than its own volume?

Why is mitosis responible for for growth, repair, and maintence

Explain one way in which a hormone can prevent contraception