Exposure to toxins during the early stages of pregnancy is more likely to cause birth defects than exposure in late pregnancy because

What are two examples of conduction that we use everyday

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?

How many chromosomes does each human cell contain? a. 23 chromosomes b. 26 chromosomes c. 43 chromosomes d. 46 chromosomes