If an animal is an invertebrate, this means that the animal
A. does not have true tissues.
B. does not have a backbone.
C. has a backbone.
D. does not have a complete digestive tract.
E. has a complete digestive tract.
B. does not have a backbone.
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If fertilization involves two gametes that contain different alleles of a given gene, the resulting offspring is
A. dihybrid. B. haploid. C. heterozygous. D. homozygous. E. polygenic.
Which of the following organisms is the causative agent of Hansen's disease (leprosy)?
A. Pseudomonas aeruginosa B. Mycobacterium avium C. Mycobacterium leprae D. Mycobacterium smegmatis
The early Earth reducing atmosphere is thought to have lacked which of the following gases?
A. N2. B. O2. C. CO2. D. H2O. E. SO4.
An adult who is suffering from hyperthyroidism:a
is always tired. b. is often hungry. c. is overweight. d. is mentally slow. e. shows a lack of emotions.