Question

knowledge and understanding
select the letter of the best answer below.

1. for which of the following would the biological species concept work best in determining whether an organism or population of organisms is a distinct species?

a. a complete set of bones of a dinosaur recovered.
b. a migratory herd of caribou mixes with a second migratory herd of caribou.
c. a population of frogs separated by a high mountain range from a population of similar - looking frogs.
d. the organisms in a bacterial population reproduce by cell division.
e. a population of plants mostly reproduces asexually by sending new shoots up from underground structures.

1. analyzing dna sequences or the proteins that genes make allows taxonomists to draw conclusions about the degree of relatedness between different organisms. which of the following statements is true?

a. dna analysis suggests that the turkey vulture is more closely related to crows and ravens than to vultures of asia and africa.
b. dna analysis suggests that what was considered one species of african elephant is in fact two species.
c. protein analysis suggests that the guinea pig is more closely related to pigs than to rodents.
d. protein analysis suggests that the horseshoe crab is indeed a crab, as was originally thought.
e. dna analysis suggests that the oviraptor and cassowary bird share a common ancestor.

1. which term describes the variety of internal and external forms in living organisms?

a. ecosystem diversity
b. structural diversity
c. genetic diversity
d. species diversity
e. biological diversity

1. which type of fungi traps live prey?

a. saprobial fungi
b. parasitic fungi
c. predatory fungi
d. mutualistic fungi
e. fungi imperfecti

1. you are given an organism and you are told it has cell walls with peptidoglycan. which type of organism do you conclude it is?

a. virus
b. prokaryote
c. eukaryote
d. prokaryote or eukaryote
e. virus of a prokaryote

1. which statement about evidence for the endosymbiotic theory of eukaryotic evolution is false?

a. the two organelles that present the strongest evidence are the nucleus and the cell membrane.
b. mitochondria and chloroplasts reproduce by binary fission.
c. the gene sequences in mitochondria and chloroplasts closely match those of living prokaryotes.
d. ribosomes of mitochondria and chloroplasts are structurally similar to those of prokaryotes.
e. the membranes of chloroplasts and mitochondria are similar to those of living prokaryotes.

1. which type of protist shows characteristics that make it difficult to classify as either plant - like or animal - like?

a. diatom
b. dinoflagellate
c. euglenoid
d. cercozoan
e. ciliate

1. which is an archaeon that requires habitats that have high concentrations of salt?

a. mesophile
b. halophile
c. acidophile
d. hyperthermophile
e. thermophile

1. which statement about species diversity is false?

a. species diversity is the variety and abundance of species in a given area.
b. ecosystems with high species diversity have less resilience to disease or harsh environmental conditions than ecosystems with low species diversity.
c. pollution and climate change are possible threats to species diversity.
d. the introduction of a non - native species to an ecosystem can lead to a decrease in species diversity.
e. carolinian canada is an ecosystem that has high species diversity.

Explanation:

1. The biological species concept focuses on reproductive isolation. A population of frogs separated by a mountain range can't inter - breed easily, so this best suits the concept.
2. DNA analysis has shown that what was considered one species of African elephant is actually two species, which is a true statement about relatedness based on DNA analysis.
3. Species diversity is the variety and abundance of species in a given area, which describes the variety of living organisms.
4. Predatory fungi trap live prey.
5. Prokaryotes have cell walls with peptidoglycan, while viruses don't have cell walls and eukaryotes have different cell - wall compositions.
6. The two organelles that provide the strongest evidence for the endosymbiotic theory are mitochondria and chloroplasts, not the nucleus and cell membrane.
7. Euglenozoans are protists that show characteristics making them difficult to classify as plant - like or animal - like.
8. Halophiles are archaea that require habitats with high salt concentrations.
9. Ecosystems with high species diversity generally have more resilience to disease or harsh environmental conditions, so the statement that they have less resilience is false.

Answer:

1. c. A population of frogs separated by a high mountain range from a second population of similar - looking frogs.
2. b. DNA analysis suggests that what was considered one species of African elephant is in fact two species.
3. d. species diversity
4. c. predatory fungi
5. b. prokaryote
6. b. Mitochondria and the cell membrane.
7. c. euglenozoan
8. b. halophile
9. b. Ecosystems with high species diversity have less resilience to disease or harsh environmental conditions.