CH.28 Protists

Question 1

Which of the following domains consists of all the organisms whose cells have true nuclei?

Answer 1

Eukarya

Question 2

Coral bleaching, which causes high coral mortality, has been occurring widely in coral reefs. Coral bleaching actually refers to the death of symbiotic dinoflagellates living within the corals. Why does coral bleaching cause the corals to die?

Answer 2

Dinoflagellates provide nutrients from the products of photosynthesis to the corals in exchange for a safe place to live

Question 3

A sign on the beach states, “Beach, Closed, Red Tide”. The organisms interfering with your use of this beach are probably

Answer 3

Dinoflagellates

Question 4

A diploid (2n) cell divides by meiosis, producing four daughter cells. Next, each daughter cell divides by mitosis, producing a total of eight granddaughter cells. Which of the following statements about the granddaughter cells is true?

Answer 4

Each granddaughter cell is haploid (n)

Question 5

According to the hypothesis of serial endosymbiosis, which of the following was a key initial step in the origin of mitochondria?

Answer 5

A prokaryotic host cell engulfed an aerobic, heterotrophic bacterium