Question 1

Which of the following features is shared by both prokaryotic and eukaryotic cells?

Accepted Answer

Presence of a cell (plasma) membrane

Question 2

According to the endosymbiotic theory, which organelle is believed to have originated from a bacterial ancestor?

Accepted Answer

Mitochondrion

Question 3

A scientist discovers a unicellular organism with a nucleus, linear DNA, and membrane-bound organelles. Which group does this organism most likely belong to?

Accepted Answer

Protists

Question 4

Which of the following best explains why mitochondria and plastids have their own DNA?

Accepted Answer

They originated as independent prokaryotic organisms that were engulfed by ancestral eukaryotic cells

Question 5

Which of the following is a correct sequence of events according to the serial endosymbiosis hypothesis?

Accepted Answer

Mitochondria evolved before plastids

Question 6

A multicellular green alga forms colonies with little or no cellular differentiation. What does this suggest about the evolutionary transition to multicellularity?

Accepted Answer

Colonial forms represent an intermediate step between unicellularity and complex multicellularity

Question 7

Which of the following is NOT a plausible reason why protists are considered structurally and functionally diverse?

Accepted Answer

They are found only in marine environments

Question 8

Which of the following is an example of a mutualistic relationship involving protists?

Accepted Answer

Dinoflagellates providing food for coral polyps

Question 9

A patient is diagnosed with malaria. Which of the following statements about the Plasmodium life cycle is correct?

Accepted Answer

Plasmodium requires both mosquitoes and humans to complete its life cycle

Question 10

Which of the following best describes the origin of most metabolic genes in eukaryotes, according to Table 25.1?

Accepted Answer

Bacterial origin

Question 11

Which supergroup includes the organism responsible for malaria?

Accepted Answer

SAR

Question 12

Which of the following is a key piece of evidence supporting the close relationship between choanoflagellates and animals?

Accepted Answer

Both share homologous proteins involved in cell adhesion

Question 13

A researcher is studying a protist that can dramatically change its shape to ensnare prey. Which cellular structure is most likely responsible for this ability?

Accepted Answer

Cytoskeletal proteins

Question 14

Which of the following best explains why the effects of climate change on marine protist producers could impact global ecosystems?

Accepted Answer

Marine protists are primary producers and form the base of many aquatic food chains

Question 15

Which of the following is a correct match between a eukaryotic supergroup and a representative organism?

Accepted Answer

SAR – Plasmodium

Question 16

Which of the following best describes the DNA in prokaryotic cells?

Accepted Answer

Circular and not enclosed in a nucleus

Question 17

A biologist observes a cell dividing by mitosis. Which type of cell is she most likely observing?

Accepted Answer

Eukaryotic cell

Question 18

Which of the following is a real-world example of a symbiotic protist that benefits its host?

Accepted Answer

Wood-digesting protists in termite guts

Question 19

Which of the following best describes the process of secondary endosymbiosis?

Accepted Answer

A eukaryote engulfs another eukaryote that already contains a plastid

Question 20

Which of the following equations best represents the ploidy of a typical eukaryotic somatic cell?

Accepted Answer

$$2n$$

Chapter 25:

Guida di studio - Domande di pratica

Study guide - Flashcard