For evolution to occur:
There must be genetic variation in a population. This provides variation on which natural selection can act. Then natural selection can act by selecting those species which are better adapted to the environmental conditions. Over time those animals that are best suited to the environment only will survive and reproduce. Those organisms successful genes will be preserved and eventually the gene frequency in the population will change, changing the overall characteristics of a population. This is how evolution occurs.
Answer:
Urban explosion would be a concern in regard to environmental science because of two major things.
Explanation:
There is the amount of space the growing cities will take up that takes away from the environment, and the pollutants the cities produce.
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Melina B.
Kinins are always present in an individual's blood. however, in the absence of infection, it is in an inactive form. The kinins are polypeptides that as blood components generate various mediators and many<span> cardinal manifestations of </span>inflammation.
Answer:
It controls the rate at which chyme enters the small intestine
Explanation:
Cephalic phase is one of the phase of gastric secretion (other two are gastric phase and intestinal phase) that begins even before food enters the oral cavity. Thinking of food stimulates the release of gastric juice via parasympathetic nervous system). Food that enters the stomach also stimulates the secretion of gastric juice by parietal cells. Partially digested food directly activates G cells (Enteroendocrine cells) to secrete gastrin which also stimulates the release of gastric juice.
Answer: Option B
Explanation:
The hormones such as follicle stimulating hormone and luteinizing hormones stimulates the ovary producing multiple eggs if taken externally in the form of medication.
There are chances that the multiple eggs and at the time of fertilization more than one egg can get fertilized at the same time and twins can form.
