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.

Biology & Microbiology

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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.

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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

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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.

Biology & Microbiology

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.

Biology & Microbiology