<span>C.the role of the bear in the ecosystem</span>
An <span>ecosystem </span>involves both the biological (plants, animals, human beings) and non-biological (land, water, soil, and atmosphere) community which interacts as a system. More importantly, the living things are very dependent on the abiotic community since it cannot survive by itself. Every animal, plant and human needs the primary physiological needs of water, food and shelter provided by the abiotic system.
Answer:
The size of the synaptic cleft is small which results in the neurotransmitters to pile up over time thus making the neurotransmitters' concentration increase and therefore can proceed with their function of sending nerve impulses. Hope that helped!
Explanation:
Plants release nectar which attracts birds to come and eat. As the bird eats the plant pollen (plant sperm) will get on the bird, and travel with it to other plants were the pollen will falls off and impregnates another plants due to plants having both female, and male bodies thus causing cross-pollination. This happen thru natural selection because the plants has nectar and pollen due them wanting to be able to spread and have more offsprings.
Answer:
C) Sound energy travelled as waves from one tuning fork to the other.
Explanation:
The air consists of particles. These particles transfer energy using waves.
bacteria dont need to mutate, thats why they evolve. bacteria doesnt need to develop resistance. this can also make bacteria very dangerous though, virus's can evolve and change after a cure is created that cannot be affected by treatment.