Answer the following question given this paragraph: You have learned that an allele is an alternative form of a gene. Most, if not all genes have alternative forms causing the resulting protein to function slightly differently. But are there alleles that cause proteins to function dramatically differently or not function at all? A mutation is a change in the DNA or RNA sequence, and many mutations result in new alleles. Some mutations have no effect on the protein, whereas others are either beneficial or harmful. In fact, evolution could not take place without the genetic variation that results from beneficial mutations. In humans, harmful mutations can result in genetic diseases. There are also chromosomal mutations, large changes with dramatic effects. See Mutations are changes in genetic information at http://www. dnaftb. org/27/animation. html for a description of the early work on mutations. Q: An allele is an alternative form of what structure? Choices: - amino acid - enzyme - protein - gene A:
gene
(Question)
Answer the following question given this paragraph: Q: Organs are groups of what working together? Choices: - muscles - bones - tendons - tissues A:
(Answer)
tissues
Ques: Answer the following question given this paragraph: A theory is constantly tested. If some data does not agree with the theory, the theory can be revised. If the theory cannot match the data, it is thrown out. That being said, sometimes a theory is well-established; it has a lot of evidence to back it up. A well-established theory is unlikely to be overthrown. It may just need to be modified a bit. But science does not prove anything beyond a shadow of a doubt. Q: In science, what is constantly tested, sometimes revised, sometimes thrown out and sometimes well-established? Choices: - a technique - a study - a variable - a theory A:
Ans: a theory
(Q).
Answer the following question given this paragraph: Q: What two activities are especially important when a number of local populations are linked, forming a metapopulation? Choices: - family reunions and emigration - flow and emigration - immigration and family reunions - immigration and emigration A:
(A).
immigration and emigration
Ques:Answer the following question given this paragraph: Sometimes power is measured in a unit called the horsepower. For example, the power of car engines is usually expressed in horsepowers. One horsepower is the amount of work a horse can do in 1 minute. It equals 745 watts of power. Compare the horsepowers in the Figure below to the other Figure below . Q: How many watts equals a horse power? Choices: - 695 - 904 - 375 - 745 A:

Ans:745
Question: Answer the following question given this paragraph: Q: Despite its small size, an erythrocyte contains about 250 million molecules of what? Choices: - calcium - plasma - potassium - hemoglobin A:
Answer:
hemoglobin