Because predators and prey must learn (or adapt) new ways of survival. Deer over time have learned to be much more sensitive to the surrounding environment, therefore, a deer's predator must also adapt/evolve and learn how to beat the deer at it's own game and catch it for food. Animals must evolve/adapt to any given environment. If humans lived in Antarctica for thousands of years, we would eventually be able to withstand the cold due to evolution. People who live in the Himalayas today actually breath normally at such high altitudes whereas if someone who lives at sea level went to where the Himalayan people lived, the result could potentiality be fatal because the body has not adapted/evolved at that point to withstand minimal oxygen.
The 4th one. Maintaining body temperature and cooling down
Answer:
Myelodysplastic (Ans. A)
Explanation:
Acute myeloblastic leukemia (AML): Is also called malignant blood cell cancer which can affect both adults & children. It is a fast-growing malignant disease where too many immature myeloblasts (WBS) are found in the RBC & bone marrow. Acute myeloblastic leukemia starts while chronic leukemia present from a long time & grow gradually. Symptoms of acute myeloblastic leukemia are:
High fever, a large no. of infections over a short period, pain in the joints, sweating a lot, etc.
Myelodysplastic syndrome: It is a group of disorder caused by blood cells (which is immature & don't work properly). Instead of developing properly the blood cells die in the bone marrow. After sometimes there are more immature cells than healthy ones, causing the problems infection caused by leukopenia, etc.
B: Antigens
Explanation: Antigens itself are the invaders that causes an infection or a disease in living organism. They do not protect against invaders in non-specific response as they themselves are the ones who are invading the body.
Digestive enzymes are the enzymes that act on a particular substrate for its action at a particular PH.
Stomach acid is the hydrochloric acid that keeps the PH of the stomach low and prevents the growth of unwanted pathogens.
Lysosomes have digestive enzymes in it. It performs the process of phagocytosis.
