Under what conditions would a molecule need to be actively transported across a membrane?

Water is considered the universal solvent because is can dissolve

Jamal is working with three ionic compounds: sodium chloride, calcium sulfide, and barium oxide. his teacher asks him which are the positive ions in each compound.

Which of the following would be a limiting factor affecting the panda population of china? a - capture of some pandas for placement in zoos b - laws protecting habitat destruction c - programs that educate people about endangered species d - a

Which statement correctly describes a feature of carrying capacity? A. can only change if the population experiences migration B. can only be calculated for species with a uniform population distribution C.

The fossils found of organisms that lived 3700 million years ago were aerobic or anaerobic?

Binary fission is reproduction in which two single celled organisms combine to form one single celled organism. a. True b. False

How does algal growth kill marine animals

As the wavelength increases, the frequency (A) decreases and energy decreases. (B) increases and energy increases. (C) decreases and energy increases. (D) increases and energy decreases.

What is the most efficient way to protect biodiversity?

Scientists claim that global climate change is threatening many species with extinction. Which statement provides the strongest evidence for this claim?