BIO112-Quiz 2

Many protists: Question 14 options: a) have cell walls in addition to plasma membranes. b) are predatory, using pseudopods to capture and consume other organisms. c) have cells without nuclei. d) are unicellular.

a,b

Which of the following is not a characteristic of most fungi? Question 6 options: a) Fungi are often mycorrhizal, living in association with plant roots. b) Fungi can be either unicellular or multicellular. c) Fungi have reproductive and vegetative morphological stages. d) Fungi only reproduce sexually.

a,b

Living organisms: Question 11 options: a) are important in biogeochemical cycles. b) must be able to move in response to stimuli in their environment. c) pass down their genes via DNA to the next generation. d) evolve to adapt to environmental conditions during their lifetimes.

a,b,c,d

The majority of prokaryotes: Question 4 options: a) prefer to live together in colonies or biofilms. b) are pathogenic to animals and plants. c) cannot be cultured in isolation. d) can only be detected using molecular techniques like PCR

a,b,d

Archaea and bacteria: Question 15 options: a) are distinguished by the makeup of their cell walls and plasma membranes. b) are easy to tell apart under a microscope. c) are both prokaryotic. d) have a more recent common ancestor than eukaryotes and archaea.

a,c

Chloroplasts in eukaryotes are similar to cyanobacteria in that: Question 13 options: a) they both use energy from the sun to make sugars for metabolism. b) they are both important in decomposing dead plant material. c) they likely evolved from a common ancestor. d) they both have genes on located circular chromosomes.

a,c

Organisms that undergo asexual reproduction: Question 9 options: a) produce exact clones with no genetic differentiation. b) are unable to reproduce sexually. c) all undergo mitosis to replicate genetic material. d) may still exchange genetic material by other means.

a,c

Prokaryotes such as Bacteria and Archaea may reproduce sexually through a process known as binary fission. Question 7 options: True False

False

Protists live symbiotically with other organisms only as parasites, using resources from the host while providing no benefits to it. Question 2 options: True False

False

Viruses are the simplest known biological agents of disease. Question 1 options: True False

True

A lichen is an example of a symbiotic relationship between a fungus and a photosynthetic organism such as algae or cyanobacteria. Question 20 options: True False

True

Prokaryotic organisms: Question 3 options: a) have long generation times and evolve slowly. b) are split into two main domains, the Bacteria and Archaea. c) do not have a nucleus. d) may form symbiotic relationships with eukaryotic organisms.

b,c

Viruses: Question 16 options: a) only infect plants or animals. b) may be surrounded by a phospholipid envelope. c) are acellular parasites. d) have a protein capsid surrounding a piece of genetic material.

b,d

Egress by viruses from the host cell: Question 10 options: a) happens after replication of its protein and genetic components but before assembly into new viruses. b) may be part of either lytic or lysogenic cycles. c) can happen by lysis or budding. d) immediately kills it.

c

Organisms that derive energy from the sun: Question 5 options: a) do not need to respire during metabolism. b) may have evolved this capacity via a process called endosymbiosis. c) still require a source of carbon for metabolism. d) may also have mitochondria.

c,d

Prokaryotes can contribute to the carbon cycle by: Question 12 options: a) consuming macronutrients and respiring carbon dioxide. b) helping decompose tough organic material such as cellulose and lignin. c) transforming nitrogen from the atmosphere into a form that plants can use. d) turning carbon dioxide into sugars by photosynthesis.

c,d

While visiting Yellowstone National Park, you observe a rainbow colored pool of water called the Prismatic Spring. You learn that the temperature of the pool can be as high as 189° F, yet there are organisms living in the pool that are responsible for its coloration. Which of the following can you say about the organisms living in this pool? Question 8 options: a) They do not need metabolism because they get all their energy from the hot water. b) They must be using RNA as genetic material to survive the extreme temperatures. c) They have evolved to maintain homeostasis in the high temperatures. d) They are extremophiles.

c,d