A mammal whose young develop inside the mother is known as a (n)

a.

marsupial

c.

monotreme

b.

placental mammal

d.

internally developing mammal

Biosphere is a term that refers to the areas on earth that contain

Which sphere protects life on earth?

What is the study of the brain

Why are comets visible only when they are near the sun?

Can a cell survive without the smooth endoplasmic reticulum?

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