Answer the following question given this paragraph: Most plasma cells live for just a few days, but some of them live much longer. They may even survive for the lifetime of the individual. Long-living plasma cells are called memory cells. They retain a "memory" of a specific pathogen long after an infection is over. They help launch a rapid response against the pathogen if it invades the body again in the future. Q: What are long living plasma cells called? Choices: - device cells - context cells - brain Cells - memory cells A:
memory cells
(Question)
Answer the following question given this paragraph: Serge Melki (Flickr:Serge Melki). The burning of charcoal is a combustion reaction . CC BY 2.0. Q: The burning of charcoal is what type of reaction? Choices: - condensation - physical - evaporation - combustion A:
(Answer)
combustion
Ques: Answer the following question given this paragraph: Heterotrophs cannot make their own food, so they must eat or absorb it. For this reason, heterotrophs are also known as consumers . Consumers include all animals and fungi and many protists and bacteria. They may consume autotrophs or other heterotrophs or organic molecules from other organisms. Heterotrophs show great diversity and may appear far more fascinating than producers. But heterotrophs are limited by our utter dependence on those autotrophs that originally made our food. If plants, algae, and autotrophic bacteria vanished from earth, animals, fungi, and other heterotrophs would soon disappear as well. All life requires a constant input of energy. Only autotrophs can transform that ultimate, solar source into the chemical energy in food that powers life, as shown in Figure below . Q: What can autographs do that heterotrophs cannot do? Choices: - live without water - make their own air - live without sleep - make their own food A:
Ans: make their own food
(Q).
Answer the following question given this paragraph: There are three types of mammals, characterized by their method of reproduction. All mammals, except for a few, are viviparous , meaning they produce live young instead of laying eggs. The monotremes , however, have birdlike and reptilian characteristics, such as laying eggs and a cloaca. An example of a monotreme is the platypus with its birdlike beak and egg-laying characteristics. The echidnas are the only other monotreme mammals. A second type of mammal, the marsupial mammal, includes kangaroos, wallabies, koalas and possums. These mammals give birth to underdeveloped embryos, which then climb from the birth canal into a pouch on the front of the mother's body, where it feeds and continues to grow. The remainder of mammals, which is the majority of mammals, are placental mammals. These mammals develop in the mother's uterus, receiving nutrients across the placenta. Placental mammals include humans, rabbits, squirrels, whales, elephants, shrews, and armadillos. Dogs and cats, and sheep, cattle and horses are also placental mammals. Q: The three types of mammals are characterized by their method of what? Choices: - specializaiton - differentiation - pattern - reproduction A:
(A).
reproduction
Ques:Answer the following question given this paragraph: Amines generally have rather pungent or noxious odors. Ammonia can be considered the simplest amine and has a very distinctive odor. Methylamine has an unpleasant odor associated with dead fish. Amines are often formed biologically during the breakdown of proteins in animal cells, and so many have the smell of death and decay. Putrescine and cadaverine are two such amines and are aptly named for their foul odors. The toxins which many animals use as a form of defense are frequently amines. Amines are used industrially as dyes and in many drugs. Q: What are often formed biologically during the breakdown of proteins in animal cells, having the smell of death and decay?. Choices: - ketones - acids - enzymes - amines A:

Ans:amines
Answer the following question given this paragraph: The ostrich egg - unfertilized, of course. Yes, this egg, just like a human ovum, is just one cell. It is a gamete with a haploid number of chromosomes, formed through meiosis. The egg shell membrane encloses the nucleus containing the genetic material and the cytoplasm. Q: The egg shell membrane encloses the nucleus containing the genetic material and what? Choices: - cerebellum - enamel - exoskeleton - cytoplasm A:
cytoplasm