Answer the following questions true (T) or false (F)
1. A person must have two alleles for hemoglobin S in order to suffer from sickle-cell anemia.
2. A carrier for a genetic disorder will pass the allele to all of their offspring.
3. If one of your parents has Huntington disease and is heterozygous for the disorder, you have a 50 percent chance of inheriting the disease.
1. TRUE
2. FALSE
3. TRUE
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What would be the ultimate effect on an ecosystem if decomposers were eliminated?
a. The consumers would have to eat twice as much. b. The rate of photosynthesis would increase. c. All life would eventually cease as nutrients would no longer be available. d. Energy flow between producers and consumers would increase. e. Producers would outgrow consumers due to the excess of carbon dioxide.
The most necessary habitat requirement of protozoa is
A. moisture. B. light. C. temperature. D. UV light.
Which of the following can carry out photosynthesis?
A. Plants B. Seaweeds C. Some bacteria D. All of the above can carry out photosynthesis
Anthropoids or higher primates include all of the following except
A. Old World monkeys. B. humans. C. New World monkeys. D. lemurs. E. apes.