Answer the following question given this paragraph: The different feeding positions in a food chain or web are called trophic levels. Generally, there are no more than four trophic levels because energy and biomass decrease from lower to higher levels. Q: What are the different feeding positions in a food chain or web called? Choices: - neural levels - Primary Level - convoluted levels - trophic levels A:
trophic levels
(Question)
Answer the following question given this paragraph: Humans have been studying the night sky for thousands of years. Knowing the motions of stars helped people keep track of seasons. With this information they could know when to plant crops. Stars were so important that the patterns they made in the sky were named. These patterns are called constellations . Even now, constellations help astronomers know where they are looking in the night sky. Q: What are observable patterns of stars found in the night sky called? Choices: - deformations - latitudes - deviations - constellations A:
(Answer)
constellations
Ques: Answer the following question given this paragraph: Most protists are so small that they can be seen only with a microscope. Protists are mostly unicellular (one-celled) eukaryotes. A few protists are multicellular (many-celled) and surprisingly large. For example, kelp is a multicellular protist that can grow to be over 100-meters long ( Figure below ). Multicellular protists, however, do not show cellular specialization or differentiation into tissues. That means their cells all look the same and, for the most part, function the same. On the other hand, your cells often are much different from each other and have special jobs. Q: What type of eukaryotes are protists normally? Choices: - multicellular - photosynthetic - immature - unicellular A:
Ans: unicellular
(Q).
Answer the following question given this paragraph: The most important difference between synthetic and naturally occurring polymers is that the former usually contain very few different monomers, whereas biological polymers can have as many as 20 different kinds of amino acid residues arranged in many different orders. Chains with less than about 50 amino acid residues are calledpeptides, whereas those with more than about 50 amino acid residues are calledproteins. Many proteins are enzymes, which are catalysts that increase the rate of a biological reaction. Q: What role do proteins play in a biological reaction? Choices: - amino acid chains - antioxidants - reverse hormones - act as catalysts A:
(A).
act as catalysts
Ques:Answer the following question given this paragraph: A catalyst is a substance that increases the speed of a reaction. Overall, a catalyst is not a reactant and is not used up, but it still affects how fast a reaction proceeds. However, a catalyst does not affect the extent or position of a reaction at equilibrium. It helps a reaction achieve equilibrium faster. Q: What is the term for a substance that causes the speed of a reaction to increase? Choices: - indicate - component - monite - catalyst A:

Ans:catalyst
Ques:Answer the following question given this paragraph: Competition is a relationship between living things that depend on the same resources. Q: What kind of relationship exists between living things that depend on the same resources? Choices: - parasitic - symbiotic - antagonistic - competition A:

Ans:
competition