Hormone – biologically active molecule that is released into circulation from site of synthesis and acts at a distant sitecan be either hydrophilic (polypeptide hormone) or lipophilic (steroid) – biogenic amines can be eitherbinds specific receptor – on cell surface (hydrophilic hormones) or inside cell (lipophilic hormones)lipophilic hormones bind carrier proteins to travel in circulation; hydrophilic hormones travel freelycis-acting elements – DNA segments in the promoter region which bind trans-acting elementstrans-acting elements – molecules that impact downstream gene transcription when they bind cis-acting elements
Answer:
<em>D) lining up of chromosomes in the cell</em>
Explanation:
Prophase can be described as the first stage of cell division. During this phase, The chromatin material condenses and becomes compact so that the chromosomes become visible. The nuclear envelope disintegrates and the nucleolus disappears. Hence, the choices mentioned in option A, B and C occur by the end of prophase.
Metaphase is the third phase of cell division. During this phase, the chromosomes line themselves in the centre of the cell. Hence, the lining of the chromosome does not occur by the end of prophase. This occurs during the third stage.
I believe they comprise a group called tetrapods . Tetrapod are organisms whose evolution began about 400 million years ago in the Devonian period with the earliest tetrapods evolving from lobe-finned fishes. They are categorized as a biological super class Tetrapoda. which includes all living things and extinct amphibians, reptiles, birds and mammals.
Microevolution occurs on small time scales within species. Migration takes places when a population moves from one area to another. These processes can affect an ecosystem's form and functionality.
Answer
4.5 m/s²
Explanation
Acceleration is defined as the rate of change of velocity with time.
The formula for finding acceleration is =change in velocity/change in time
change in velocity=15m/s - 6m/s=9m/s
change in time =2s-0s=2s
Acceleration is given by⇒9m/s ÷ 2s =4.5m/s²
