Refer to the accompanying figure. The average weight of a female guppy in the experimental group is:
a. 70 g.
b. 80 mg.
c. 170 mg.
d. 180 g.
e. 190 mg.
e
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The____layer of the digestive tract in mammals is in direct contact with the lumen
a. mucosa b. muscularis c. submucosa d. serosa e. serosa and muscularis
The __________ are very common arthropod Paleozoic fossils, and are extinct today
A. moss animals B. trilobites C. lophophorate animals D. tardigrades E. phoronids
The smallest biological unit that can evolve is the ______.
a. phylum b. population c. individual d. species
Which of the following statements about human genetic disorders is false?
a. Individuals who are heterozygous for sickle cell disease are resistant to malaria. b. Most genetic disorders are rare because they are either fatal at an early age or result in sterility c. Non disjunctions are chromosomal disorders that result in individuals with extra or missing chromosomes d. Carriers of recessive genetic disorders are phenotypically normal because the recessive allele is not expressed e. Pedigrees of related individuals can be used to help determine if a trait is autosomal or sex-linked