If I remember correctly, there are two main types of transport—passive and active. Passive transport does not require energy or ATP, whereas active transport does.
Types of passive transport include diffusion and osmosis, both of which involve moving down a concentration gradient and thus not requiring energy.
Active transport moves up the concentration gradient and does require energy.
Perhaps someone who has taken bio within the last several years can correct anything I might have misstated here.
Answer:
A hawk eats a snake, which has eaten a frog, which has eaten a grasshopper, which has eaten grass.
Explanation: A food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is part of multiple food chains. Each food chain is one possible path that energy and nutrients may take as they move through the ecosystem.
The round-seed allele would be termed as dominant. A dominant allele is always expressed. The non-dominant allele, or the recessive allele is overshadowed by the dominant. So in this case, the recessive allele would be the wrinkled-seed allele and the dominant one is the round-seed allele.
1. They are much like empty atoms
Answer:
Liver, 25-hydroxycholecalciferol.
Explanation:
Vitamin D is a fat soluble vitamin that increases the absorption of phosphate and calcium in the body. Vitamin D2 and D3 are most important for the human health.
The hydroxylation of cholecalciferol occur in the liver in order to be active vitamin D. The first hydroxylation of cholecalciferol produces 25-hydroxycholecalciferol.
Thus, the answer is liver, 25-hydroxycholecalciferol.
