PLEASE HELP WILL GIVE BRAINLIEST!! 6. Fill in the blanks about the nitrogen cycle. Nitrogen from the atmosphere is fixed into a usable form in the soil by or by . Sometimes little pockets of bacteria live in on plant roots, helping t plants get the nitrogen they need for their tissues. Once the nitrogen is fixed in the soil, plants will pick up with their . Animals will get their nitrogen by plants or other organisms in the food chain. When plants and animals die, the nitrogen will be returned to the soil by . return nitrogen in the soil to the atmosphere by converting to gas.​

Ry was studying two populations of the same species of lizards. one population lived on an island and the other lived on the mainland. both populations were affected by a hurricane that hit the island and the mainland with equal force. a year later, henry was testing the gene frequency and saw a decrease in genetic variation in the island species, but not in the mainland species. which best describes a conclusion he might have reached? gene flow greatly affects small populations, but large populations can recover. genetic drift greatly affects small populations, but large populations can recover. gene flow greatly affects large populations, but small populations can recover. genetic drift greatly affects large populations, but small populations can recover.

Plz ! cattle ranchers and dairy farmers rarely allow all of their animals to reproduce instead they practice selective breeding and only encourage the reproduction of animals with specific features. which of the following cows would a dairy farm most likely choose to reproduce? a. a cow that makes a lot of milk. b. a cow that can run quickly. c. a cow with a think, soft fur. d. a cow with large, strong hooves.

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important