Answer:
Cancer is the uncontrolled growth of abnormal cells in the body. Cancer develops when the body's normal control mechanism stops working. Old cells do not die and instead grow out of control, forming new, abnormal cells.
The hypothalamus detects slightest changes in internal temperature as blood flows in the brain and send impulses to appropriate responding organs/tissues to bring it back to normal level. These organs include the skin, liver and muscles.
Parts of skin involved in thermoregulation are the sweat glands,as temperature increases sweat glands are stimulated to release sweat. As the water in sweat evaporates,it absorbs heat from the body ( latent heat of vaporization) through radiation and convectional current. When the body temperature decreases, the blood vessels in the skin constricts( vasoconstriction). This reduces blood flow to the skin hence less heat is lost to the internal environment.
Metabolic activities of the liver and muscles increase to raise heat production when the body temperature is low
Answer:
They use spears.
Explanation:
The hunting method that the Clovis people used for killing the large animals is the use of spears. These spears have a pointed head which easily penetrate in the body of these large animals and kill them in a very less time. They mostly hunt big animals in groups which make easier the hunting of animals. In this period when the Clovis people were present, extinction of mammoths, giant sloth and bison in North America occurs due to hunting and climate change.
Answer:
True
Explanation:
This is essentially natural selection. If there is a population of giraffes and half of them have long necks and the other half have short necks, the ones with long necks will be more likely to survive because they will be able to reach more leaves on tall trees. This means the ones with short necks will be less likely to survive, so when the long neck giraffes reproduce, they will pass on the gene for a long neck to their offspring. Over time, there will be more and more long neck giraffes and fewer short neck ones.
This is just a silly example but it is actually have animals have evolved over thousands of years lol
Answer:
You have no full question.
Explanation:
