Carbon is a reactant in the process of photosynthesis but a product in the process of cellular respiration.
<h3>What is carbon cycle?</h3>
Carbon cycle is the physical cycle of carbon through the Earth’s biosphere, geosphere, hydrosphere and atmosphere.
It is the series of processes by which carbon compounds are interconverted in the environment, that includes such processes as
- photosynthesis
- decomposition
- respiration
- carbonification
Carbon cycle involves the incorporation of carbon dioxide into living tissue by photosynthesis and its return to the atmosphere through respiration, the decay of dead organisms, and the burning of fossil fuels.
Therefore, carbon is present in the atmosphere as a reactant during photosynthesis and as a product during cellular respiration.
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Answer: option A - Constant in genotype and phenotype
Explanation:
Pan mixia is a situation in which an individual is just as likely to mate with another randomly chosen individual as any other in the population
In a situation as described in the question, sexual reproduction is limited to organisms of the same habitat, thus the genetic variation is reduced to the BAREST MINIMUM.
This results in Constancy in genotype and phenotype
Answer:
d. Clarify that a BRCA1 mutation does not preferentially express ovarian cancer over breast cancer in any given family.
Explanation:
When a faulty copy of BRCA1 is inherited in women it results to a 65 % probability of developing breast cancer at age 70 and 39% probability of ovarian cancer. Therefore, it will be necessary to clarify that a BRCA1 mutation does not preferentially express ovarian cancer over breast cancer in any given family.
Answer:
Two groups of proteins, called cyclins and cyclin-dependent kinases (Cdks), are responsible for the progress of the cell through the various checkpoints. Cyclins regulate the cell cycle only when they are tightly bound to Cdks.
Explanation: