What is the likely origin of chloroplasts?
A) mitochondria that had a mutation for photosynthesis
B) photosynthetic prokaryotes that lived inside eukaryotic cells
C) prokaryotes with photosynthetic mitochondria
D) eukaryotes that engulfed photosynthetic fungi
Answer: B
You might also like to view...
Estuaries tend to be well supplied in the following limiting nutrient(s) of the open ocean:
a. phosphorus. b. nitrogen and silica. c. phosphorus and silica. d. nitrogen and phosphorus. e. carbon and oxygen.
Human chorionic gonadotrophin (hCG) is produced during pregnancy by the ovaries. Indicate whether the statement is true or false
A woman struggling with a bacterial illness is prescribed a month's supply of a potent antibiotic. She takes the antibiotic for about two weeks and feels much better. Should she save the remaining two-week supply, or should she continue taking the drug?
A) She should save the drug for later, because if she keeps taking it the bacteria will evolve resistance. B) She should save the drug for use the next time the illness strikes. C) She should save the drug because antibiotics are in short supply, and she may need it to defend herself against a bioterrorism incident. D) She should continue taking the drug until her immune system can completely eliminate the infection. Otherwise, some bacteria may remain in her system, and they will probably be resistant.
A person with the genotype IAIB has type AB blood. This is an example of:
A) monohybridness. B) incomplete dominance. C) dihybridness. D) the effect of the environment on phenotype. E) codominance.