Which of these animals is a living representative of the Sphenodontids?

1.box turtle
2.Komodo dragon
3.rattlesnake
4.tuatara


4

Biology & Microbiology

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The number of circuits in the circulatory systems of humans is

a. one. b. two. c. three. d. four.

Biology & Microbiology

Queen Victoria ____

a. was a carrier of hemophilia b. had a hemophilic parent c. had hemophilia d. married a man with hemophilia e. both had a hemophilic parent and married a man with hemophilia

Biology & Microbiology

The subatomic particle with a positive charge is ________.

A. a neutron B. an electron C. an isotope D. an ion E. a proton

Biology & Microbiology

In Drosophila, the allele red eyes (bw+) is dominant to the allele for brown eyes (bw).  At another gene locus on the same chromosome, the allele for thin wing veins (hv+) is dominant to the allele for heavy wing veins (hv). Flies homozygous for bw and hv+ are crossed to flies homozygous for bw+ and hv to obtain doubly heterozygous F1 progeny.What would be the results of a test cross with the F1 flies?

A. 1 brown eye, thin wing veins: 1 red eye, heavy wing veins B. 1 brown eye, heavy wing veins: 2 red eye, thin wing veins: 1 red eye, thin wing veins C. 1 brown eye, thin wing veins: 2 red eye, thin wing veins: 1 red eye, heavy wing veins D. 1 brown eye, heavy wing veins: 1 red eye, thin wing veins

Biology & Microbiology