I believe they are made through protein synthesis. The Cyclin is a family of proteins that control the progression of cells through the cell cycle by activating cyclin-dependent kinase (Cdk) enzymes. Through phophorylation, Cdks signal the cell that it is ready to pass into the next stage of the cell cycle. Cyclin-Dependent Protein Kinases are dependent on cyclins, another classof regulatory proteins. Cyclins bind to Cdks, activating the Cdks to phosphorylate other molecules.
<span>d. Tropical dry forest
</span>A biome is composed of various diverging ecosystems that relates with the community. Biomes can either be deserts, grassland, savanna, tropical rain forest, taiga, boreal and etc. <span>An ecosystem involves both the biological (plants, animals, human beings) and non-biological (land, water, soil, and atmosphere) community which interacts as a system. </span>
Animals get protein from diet.
<h3><u>Explanation:</u></h3>
Proteins are one of the important part of diet which constitute about one fifth of an ideal diet. This proteins are formed of amino acids. There are 20 amino acids in nature, of which 9 are essential amino acids and 11 are non essential amino acids. The non essential amino acids are prepared in our body by enzymes. But the essential amino acids are needed to be supplied from outside via diet to get access to. So proteins are needed to be present in diet.
Answer: Five
Each pond or lake have typically five zones in common.
1. The littoral zone: It is the shore area of the pond or lake. It is a transition zone between the dry shore area and the open water.
2.The limenetic zone: It is the open water area of the lake or pond. This is the portion of water that receives sunlight light.
3.The euphotic zone: It is the zone where, algae and other plants grows. Also, this zone favors the growth of aquatic animals such as fishes, because oxygen levels are higher as this zone traps the atmospheric oxygen.
4. The profundal zone: It is the zone located below the limentic zone. This zone is not penetrated by sunlight. The size of the zone depends upon the age and water clarity of the pond or lake. It exhibit low fish and plant population because of the lack oxygen present in this zone.
5. The benthic zone: It is the zone which is found at the bottom of the lake or pond. It consists of organic sediments and soil. This zone involves decomposition activity of the dead organic matter obtained from dead algae, plants, fish and animal wastes.
