Answer the following question given this paragraph: The plasma membrane forms a barrier between the cytoplasm inside the cell and the environment outside the cell. It protects and supports the cell and also controls everything that enters and leaves the cell. It allows only certain substances to pass through, while keeping others in or out. The ability to allow only certain molecules in or out of the cell is referred to as selective permeability or semipermeability. To understand how the plasma membrane controls what crosses into or out of the cell, you need to know its composition. Q: The ability for a plasma membrane to only allow certain molecules in or out of the cell is referred to as what? Choices: - periodic permeability - total permeability - moderate permeability - selective permeability A:
selective permeability
(Question)
Answer the following question given this paragraph: There are about 22,000 genes in every human cell. Does every human cell have the same genes? Yes. Does every human cell make the same proteins? No. In a multicellular organism, such as us, cells have specific functions because they have different proteins. They have different proteins because different genes are expressed in different cell types (which is known as gene expression ). Q: Every human cell has the same what, and each cell has thousands of them? Choices: - chromosomes - DNA - ribosomes - genes A:
(Answer)
genes
Ques: Answer the following question given this paragraph: Ocean water appears cyan because the microbes in the water preferentially absorb red light. What color does a red lobster appear on the ocean floor? How about a white shirt with blue stripes?. Q: Ocean water appears cyan because microbes in the water preferentially absorb what color of light? Choices: - blue - green - yellow - red A:
Ans: red
(Q).
Answer the following question given this paragraph: Archaeplastida Red algae and green algae are included in the supergroup Archaeplastida. It was from a common ancestor of these protists that the land plants evolved, since their closest relatives are found in this group. Molecular evidence supports that all Archaeplastida are descendents of an endosymbiotic relationship between a heterotrophic protist and a cyanobacterium. The red and green algae include unicellular, multicellular, and colonial forms. Red Algae Red algae, or rhodophytes, are primarily multicellular, lack flagella, and range in size from microscopic, unicellular protists to large, multicellular forms grouped into the informal seaweed category. The red algae life cycle is an alternation of generations. Some species of red algae contain phycoerythrins, photosynthetic accessory pigments that are red in color and. Q: In which supergroup are red algae and green algae included? Choices: - xerophyte - spirogyra - troglodyte - archaeplastida A:
(A).
archaeplastida
Ques:Answer the following question given this paragraph: The ears are also responsible for the sense of balance. Balance is the ability to sense and maintain body position. The semicircular canals inside the ear (see Figure above ) contain fluid that moves when the head changes position. Tiny hairs lining the semicircular canals sense movement of the fluid. In response, they send nerve impulses to the vestibular nerve, which carries the impulses to the brain. The brain interprets the impulses and sends messages to the peripheral nervous system. This system maintains the body's balance by triggering contractions of skeletal muscles as needed. Q: What external feature in human beings is responsible for balance? Choices: - tails - brain - hands - ears A:

Ans:ears
Ques: Answer the following question given this paragraph: Secretion of the hormone cholecystokinin, which stimulates release of pancreatic juices and bile. Q: What does the secretion of the hormone cholecystokinin stimulate the release of? Choices: - sweat, saliva - urea - insulin and pepsin - pancreatic juices, bile A:
Ans:
pancreatic juices, bile