Eyelash length is an inherited trait. In the human population, there is an eyelash length gene. There are two possible variants of this gene - an allele for long eyelashes (> 1cm) and an allele for short eyelashes (1 cm or less). The allele for long eyelashes is dominant (L) and the allele for short eyelashes is recessive (l). An individual who is heterozygous for eyelash length would have which
of the following phenotypes?
A. ll
B. LL
C. Ll
D. Long eyelashes
E. Short eyelashes
D. Long eyelashes
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In the technique of artificial twinning,
a. two embryos are fused. b. an embryo is teased apart. c. two sperm are used to fertilize a single egg. d. two eggs and two sperm are used to form two embryos. e. an embryo’s nucleus is removed and replaced with an adult embryo
Because the thermocline is permanent in tropical oceans, little vertical mixing occurs, resulting in low productivity
Indicate whether the statement is true or false
Red foxes eat a wide variety of plants and animals, so we would say they are ________
A) carnivores B) omnivores C) parasites D) producers
In a laboratory bacterial cell culture that has been infected by a virus, plaques are areas in which
a. bacterial cells are resistant to the virus and have not been infected. b. there is no nutrient available for the bacteria to grow. c. the virus has spread and left behind the remains of dead cells. d. the virus has not yet spread to that area of cells.