Answer:
To maintain body homeostasis
Explanation:
The endocrine system consists of the endocrine glands that release hormones directly int the blood. Those hormones bind to their receptors on the target cells and thus regulate their function. The major glands are:
pineal gland-releases melatonin, controls sleep cycle
pituitary gland-control growth, blood pressure, thyroid glands and metabolism etc.
pancreas-secretes insulin and glucagon, control of blood sugar levels
ovaries, testes-reproductive role (release female and male hormones)
thyroid gland-controls metabolism and protein synthesis
parathyroid gland-controls Ca levels
hypothalamus-connects nervous and endocrine systems, controls other glands
adrenal glands-release adrenalin and steroid hormones.
Answer:
Bats are the only mammals that can fly, but vampire bats have an even more interesting distinction—they are the only mammals that feed entirely on blood.
Nocturnal Behavior
These notorious bats sleep during the day in total darkness, suspended upside down from the roofs of caves. They typically gather in colonies of about 100 animals, but sometimes live in groups of 1,000 or more. In one year, a 100-bat colony can drink the blood of 25 cows.
During the darkest part of the night, common vampire bats emerge to hunt. Sleeping cattle and horses are their usual victims, but they have been known to feed on people as well. The bats drink their victim's blood for about 30 minutes. They don't remove enough blood to harm their host, but their bites can cause nasty infections and disease.
Hunting for Blood
Vampire bats strike their victims from the ground. They land near their prey and approach it on all fours. The bats have few teeth because of their liquid diet, but those they have are razor sharp. Each bat has a heat sensor on its nose that points it toward a spot where warm blood is flowing just beneath its victim's skin. After putting the bite on an animal, the vampire bat laps up the flowing blood with its tongue. Its saliva prevents the blood from clotting.
Young vampire bats feed not on blood but on milk. They cling tightly to their mothers, even in flight, and consume nothing but her milk for about three months.
The common vampire bat is found in the tropics of Mexico, Central America, and South America.
Hope it helps!
A genetic outcome of a genetic cross between the same parents is independent of previous outcomes.
<h3>What is genetic variation?</h3>
Genetic variation can be defined as the genetic poll of an organism, which is the raw material trough which evolution can occur by natural selection.
During sexual reproduction, the formation of gametes generates different genetic backgrounds which are independent of distinct gametes.
In conclusion, each genetic outcome of a genetic cross between the same parents is independent of all previous outcomes.
Learn more about genetic variation here:
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<span>Sensory and motor nerves make up the central nervous system.</span>
Emotion is one of the responses of an organism (whole) which
involves physiological arousal. Other than indicating emotion, physiological
arousal or heightened physiological activity is modernly used in polygraphs.
Polygraphs or lie detector notes changes in blood pressure, pulse, respiration
while the subject is asked and answers questions. It is based on the assumption
that dishonest answers are indicated with physiological arousal.