Explanation:
The hydrologic cycle describes the pilgrimage of water as water molecules make their way from the Earth's surface to the atmosphere, and back again. This gigantic system, powered by energy from the sun, is a continuous exchange of moisture between the oceans, the atmosphere, and the land.
Answer:
Just took this - it is: by observing cellular respiration under the absence of light.
Explanation:
The purple spots on the colorless background of corn kernels observed by Barbara McClintock were the result of the transposition of the Ds elements out of the color gene.
<h3>What are the genetic elements found in corn?</h3>
- A transposable element is removed from one spot in the DNA and inserted into a different site in the DNA during the process of genetic transposition, which allows genes to shift their location on chromosomes.
- The first recognized genetic instability was caused by genetic transposition.
- The size of the tissue patch displaying the reversion phenotype increases as a reversion event happens earlier in the kernel development.
- Barbara McClintock saw purple dots on maize kernels with an otherwise colorless background.
- These spots were caused by the Ds components of the color gene being transposed.
- The wild-type (purple) phenotype manifests itself in cells where Ds from the color gene "C" sequence has been lost.
Hence, Barbara McClintock discovered purple patches on the colorless backdrop of maize kernels due to the transposition of the Ds elements out of the color gene.
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The scales or outer layer of an artichoke are called bracts
In addition to loss of muscle mass, inadequate calorie intake can lead to loss of bone density and an increased risk of fatigue, illness, injuries and poor recovery.
<h3>Why is it important to consume adequate calories?</h3>
- When your consumption of calories is not adequate, your body will not get all the necessary nutrients.
- It slows down the metabolism so as to conserve energy
- Calorie restriction can lead to reduce in leptin, a hormone that regulates appetite.
- Lower levels of leptin can lead to increase in hunger thus a person overeats. This results in increase in body weight.
- Low-calorie dieting increases stress and results in the release of the stress hormone (cortisol).
- Due to response to stress, the body conserves energy and the metabolism slows to combat the risk of starvation.
- Therefore, it is important to consume appropriate amount of calories and nutrients.
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