A fetus has been developing for three months. What will happen next?

A. External sex organs form.

B. Hands and feet form.

C. Eyes develop.

D. The heart starts beating.

Why do scientists publish their findings in scientific journals?

Living matter is at least sixty percent water. It makes sense, then, that cell membranes are made of phospholipids because A) phosphates dissolve in water. B) the bilayer acts to repel water. C) the lipids form an insoluble barrier.

Which naturally derived chemical can be used to treat malaria? A. Carbohydrate B. Morphine C. Kava Kava D. Quinine

Q1: How are all of the five biogeochemical cycles similar? A) involve fossil fuels. B) All are affected by humans. c) Each is driven in part by bacteria. D) Each has a strong atmospheric component.

Why are emperor penguins a species

Cameron is collecting data to determine the time of completion for each stage of germination in seeds. He is using bean seeds for his investigation and recording his results. He repeats his data collection many times to obtain reliable results.

Which human action has not lead to significant changes in Earth's biomes?

Which two characteristics of living things do viruses exhibit?

You are studying the source of new virus that has recently infected humans. You suspect that the virus was transferred from other primates (they exhibit a similar infection), specifically chimpanzees, gorillas, or orangutans.

According to the diagram liverworts are