When a child is born with down syndrome, when did the mutation occur?

What effect might tectonic plate movement have on the size of an ocean basin

Women capable of becoming pregnant are often deficient in which vitamin? folate vitamin b6 vitamin c vitamin d

What is the cytochrome c gene, and why would that gene be useful for constructing a phylogenetic tree?

Give a scientific explanation of evolution.

Which type of cell completes a cell cycle the fastest

In living things, smaller substances are linked to make up larger substances. Which of the following correctly describes a larger substance made by linking smaller substances? Nucleic acids are linked to make up proteins.

Describe the environment in Madagascar

Example of a food chain of which fungi is a part?

Environmental manipulation can result in unforeseen consequences true or false

Why do some leaves turn yellow or orange in the fall? A) to attract beneficial insects B) because the chlorophyll pigment has broken down D) because the carotenoid pigment has increased