Question 1

Which of the following statements best distinguishes Bacteria from Archaea?

Accepted Answer

Bacteria have peptidoglycan in their cell walls, while Archaea do not.

Question 2

A patient is diagnosed with a bacterial infection. According to Koch’s Four Postulates, which step is necessary to confirm that a specific bacterium is the cause of the disease?

Accepted Answer

The bacterium must be isolated from the diseased host and grown in pure culture.

Question 3

Which process allows prokaryotes to acquire new genetic material from their environment by directly taking up DNA fragments?

Accepted Answer

Transformation

Question 4

A bacterium that uses light as an energy source and organic compounds as a carbon source is classified as a:

Accepted Answer

Photoheterotroph

Question 5

Which of the following best explains why oxygen ($$O_2) is an $$effective electron acceptor in cellular respiration?

Accepted Answer

Oxygen has a high electronegativity, allowing it to efficiently accept electrons at the end of the electron transport chain.

Question 6

Which of the following scenarios is an example of bioremediation?

Accepted Answer

Using bacteria to break down oil spills in the ocean.

Question 7

Which of the following is a key piece of evidence supporting the endosymbiosis theory for the origin of mitochondria?

Accepted Answer

Mitochondria have their own circular DNA similar to that of bacteria.

Question 8

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

Accepted Answer

A eukaryotic cell engulfs another eukaryotic cell that already contains a chloroplast.

Question 9

Which of the following statements about alternation of generations in land plants is correct?

Accepted Answer

The gametophyte produces gametes by mitosis, and the sporophyte produces spores by meiosis.

Question 10

Which of the following adaptations allowed plants to colonize dry land environments?

Accepted Answer

Development of a cuticle and stomata to reduce water loss.

Question 11

A botanist discovers a plant with one cotyledon, parallel leaf veins, scattered vascular bundles, and flower parts in multiples of three. This plant is most likely a:

Accepted Answer

Monocot

Question 12

Which of the following best describes the function of xylem in vascular plants?

Accepted Answer

Transporting water and minerals from roots to shoots.

Question 13

Which of the following is a mutualistic relationship involving fungi?

Accepted Answer

Mycorrhizal fungi associating with plant roots to enhance nutrient uptake.

Question 14

Which of the following best explains why fungal spores are considered the most fundamental reproductive cell in fungi?

Accepted Answer

Spores can disperse and germinate into new mycelia under favorable conditions.

Question 15

Which of the following is a key difference between the flagella of prokaryotes and eukaryotes?

Accepted Answer

Eukaryotic flagella are composed of microtubules arranged in a 9+2 pattern, while prokaryotic flagella are made of flagellin protein.

Question 16

A fungal hypha that lacks septa and contains many nuclei within a single continuous cytoplasm is called:

Accepted Answer

Coenocytic hypha

Question 17

Which of the following best describes the ecological role of saprophytic fungi?

Accepted Answer

They decompose dead organic matter, recycling carbon and nutrients in ecosystems.

Question 18

Which of the following is a correct sequence of events in the nitrogen cycle involving prokaryotes?

Accepted Answer

Nitrogen fixation by bacteria converts $$N_2 to $$ammonia, which is then converted to nitrite and nitrate, and finally denitrified back to $$N_2.$$

Question 19

Which of the following is a defining feature of angiosperms that contributed to their evolutionary success?

Accepted Answer

The presence of flowers and fruits that aid in pollination and seed dispersal.

Question 20

Which of the following best describes the process of double fertilization in angiosperms?

Accepted Answer

One sperm fertilizes the egg to form a zygote, while another sperm fuses with two polar nuclei to form the endosperm.

Biological Diversity: Study Guide for Bacteria, Archaea, Eukaryotes, Plants, and Fungi

Guida di studio - Domande di pratica

Study guide - Flashcard