Genome sequencing of the parasitic protist Plasmodium falciparum has been completed. One of the results is
A. Plasmodium is highly genetically similar to its host, Anopheles.
B. Plasmodium is highly genetically similar to its host, Drosophila.
C. Plasmodium has a chloroplast-like apicoplast that could be targeted by drugs.
D. Plasmodium produces fatty acids that are similar to ones found in humans and could be targeted by drugs.
C. Plasmodium has a chloroplast-like apicoplast that could be targeted by drugs.
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Why is speciation by polyploidy more likely in plants than in animals?
A) Plant gametes can be produced by meiosis from somatic cells that have undergone many rounds of mitosis. B) Plant gametes lack postzygotic isolating mechanisms. C) Plants are sessile and, therefore, are never prezygotically isolated to ensure reproduction. D) Plants are sessile and cannot speciate via dispersal. E) Plants lack the DNA repair enzymes that animals have.
Which is true of the Clostridium botulinum toxin?
A. It is heat-sensitive. B. It is a neurotoxin. C. It blocks nerve to muscle signal transmission. D. It is a two-part toxin. E. All of the choices are correct.
Where a given species of vertebrate lives has dramatically shaped the evolution of respiratory adaptations, particularly since the oxygen concentration in air is approximately 20 times that of the oxygen concentration in water. Per unit area of gas exchange surface, which group of vertebrates can extract the greatest total amount of oxygen from the external medium?
A. fish B. mammals C. reptiles D. amphibians E. birds
The sex of an individual is determined at the moment of fertilization.
Answer the following statement true (T) or false (F)