A protein channel in a hydrogen ion pump is shown below. What would happen if the concentration of H + ions were higher inside the mitochondrion than outside the mitochondrion when the channel opened?

Which groups of plants were probably most active in secondary succession and re-establishing the native habitat?

The bones in the front fins of whales and the bones in the human arm evolved from a common ancestor but carry out different functions. This is an example of A. embryonic structures. B. analogous structures C. homologous structures. D.

After Darwin concluded his voyage on the Beagle, he proposed that the process of natural selection was a mechanism for: A. sexual selection. B. overpopulation of finches on the Galapagos Islands. C. speciation. D. evolution. E. artificial selection.

Giraffes with short necks lived in arid regions. Over time, grasses disappeared, forcing giraffes to eat from trees. Mutations in the genome led to some giraffes inheriting the trait for long necks.

Living organisms contain many complicated molecules. Which of these is a reason that carbon is important in these molecules? A. a carbon atom can form a bond with only one other carbon atom. B. carbon bonds with the lightest and smallest element. C.

How does a diaphragm prevent pregnancy Select one of the options below as your answer: a. It releases spermicide into the uterus to keep sperm from fertilizing eggs. b. It produces hormones that keep a woman's ovaries from releasing eggs. c.

What do you mean by the term adaption

In Figure 22-4, which letters indicate the sporophyte or structures that include the sporophyte? A. A, B, C, D, E B. F, G, H, I, J C. A, B, D, E, G, H, I, J D. C, F

The most dangerous gas inhaled with each puff of a cigarette is

How can an increase in biodiversity lead to an increase in ecosystem stability? a. A more biodiverse ecosystem is not subject to change. b. A more biodiverse ecosystem has a higher chance of adapting to species changes. c.