Answer:
Correct answer is C.
The star must be 29 times larger than Earth's sun, and a supernova explosion must have occurred.
Explanation:
A black hole is a giant, gaseous and huge structure present in the space.In physical appearance, it ca be 29 times more massive and bulky than the sun. The black hole pulls energy and matter from the surrounding galaxies and is becoming enormous in size day by day.
Moreover, a black hole pulls light from its surrounding matter with so much gravity that it gets trapped and can not escape from it. Stellar is a kind of black hole which emerges when a big star collapses or falls in automatically. When it occurs an exploding star "supernova" is formed which bursts out into an explosion.
First leukemia is blood-forming tissues, hindering the body's ability to fight infection. It causes you to have dizziness, fatigue, fever, or loss of Appetite
Answer:Hunger is regulated by the hypothalamus, which receives chemical signals, called GHRELIN from the empty stomach to signal hunger and sends another chemical signal called CHOLECYSTOKININ to indicate fullness.
Explanation:
Feeding is one of the basic needs of a living thing. Physiologically, the human body has a way of sending signals to the brain to indicate the needs to eat food and to indicate fullness after feeding has occurred. Ghrelin, also called hunger hormone, is produced by the endocrine cells of the stomach and this signal is received by the hypothalamus as hunger signals, and the need to eat. The level of this hormone is usually higher before meals. After a meal is being taken, the hormone, cholecystokinin by the gastrointestinal tract to suppress appetite and indicate fullness.
It is true that amoebas prey upon algae in aquatic environments.