The usefulness of microvilli to cells that have them is a. to aid in their locomotion b. to concentrate food particles c. for intracellular trafficking of molecules d. to increase their surface area e. none of the above

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca

Is becoming less expensive to screen blood samples for dna certain diseases have genetic basis what is possible ethical concern about the availability of inexpensive dna testing

Which statement is not an accurate description of meiosis? a) meiosis produces offspring that are genetically diverse. b) meiosis produces offspring that are identical to the parent. c) in sexual reproduction half of the genetic material comes from the father (sperm) and half of the genetic material comes from the mother (egg). d) meiosis decreases the number of chromosomes by half so that when a sperm fertilizes an egg, the resulting zygote has the correct number of chromosomes.