C) small, one-celled organisms and primitive jellyfish
Answer:
D
Explanation:
when the amount of snowshoe hares increases, the more food will be eaten. since they are herbivores of the same species, they are competing for the same plant (the willows). the more that's eaten of the plant, the more poison is released, resulting in decreased hare population.
Answer:
Inside the muscle, calcium facilitates the interaction between actin and myosin during contractions (2,6). ... Calcium binds to the troponin, causing a position change in tropomyosin, exposing the actin sites that myosin will attach to for a muscle contraction (5,6). Blood Clotting. Without calcium blood would not clot.
Explanation:
Nitrogen-fixing bacteria change nitrogen into a form of soluble nitrates that plants can use ...the air is 80% nitrogen but it is in N2 form which plants cannot use
Enhancers are eukaryotic DNA sequences that can be used to elevate transcription and have variable positions and orientations.
