When do your lungs work the hardest

A substance that enters Earth's cycles and does harm to living things is A. hydrogen. B. a pollutant. C. freshwater. D. oxygen.

What is Biotic a living thing or not

What about Earth allows it to maintain bodies of water? a) moderate tempatures b) comet crashes c) tides d) mountains

The human genome project is an attempt to

In some conditions caused by mutations, it is beneficial for an individual to be a carrier of the disorder, and not have the full homozygous condition. This is known as fitness. sickle cell trait. heterozygote advantage. homozygote advantage.

Where do the axons of ganglion cells leave the eyeball?

Which of the following is not a factor in determining population size? a. the food supply b. birth rate c. available niches d. detritivore activity

Which is potentially a pathogen? a. acid rain b. toxic chemicals c. chlorine d. a virus

What scientific questions could Clyde ask about the compost pile? Check all that apply. Which item breaks down the fastest? Does decaying fruit smell the worst? Will the items break down faster if heat is added?

Cells that only have one copy of each chromosome are called haploid cells. Which types of cells in our body are haploid?