Immediately after gastrulation:

1. The embryo forms a blastula

2. Sperm travel to the oviduct

3. The body axis of the embryo appears

4. The fetus' circulatory system begins to mature

How is scientific work different from nearly all other human activities?

Which of the following is true about external fertilization? a. A large number of offspring are produced. b. Only a few gametes are produced. c. It occurs in all mammals. d. It does not require water.

In what part of a mitochondrion does the krebs cycle occur

Which scenario describes a physical change? The bright blue color of a concentrated copper (II) sulfate solution fades as it is diluted by the addition of water.

How does salinity differ in the oceans?

Blood is a mixture that is more specifically described as a

If one parent has homozygous dominant tall gene and another parent has heterozygous tall gene, what's the probability of having a child that's short? Tall?

8. Charles Darwin was the first individual to convince the scientific community of the occurrence of biological evolution. He based his findings on observations which he then used to make inferences regarding changes in populations of species.

What do you think might affect how pathogen is spread from person to person

The stomach is ___ to the heart. anterior inferior posterior superior