Which is true about the global nutrient cycle?

Prokaryotes are both vital decomposers and producers.

Attempts to breed horses and donkeys fail, due to gametic isolation.

False, they do breed infertile offspring successfully.

Fossils are defined as evidence of organisms from at least 5,000 years ago.

False, fossils are at least 10,000 years old.

Endosymbiotic theory explains

how mitochondria and chloroplasts originated

The impact of a large meteorite with Earth would have most likely caused mass extinctions by

large clouds of dust to block out sun and destroy plants.

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CH 14

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Questions 15

Answers

1
What is a unique feature that distinguishes plant cells from animal cells?
none of these are unique
cell walls
mitochodria
chloroplasts
2
Polyploidy is common in plants.
F
T
3
Which is true about the global nutrient cycle?
Global nutrient cycles hare not impacted by bacteria.
All of these are true.
The cycle is sustained by predators.
Prokaryotes are both vital decomposers and producers.
4
When a species ceases to exist, it is _____.
endangered
neither
extinct
both
5
What makes you look different from your siblings (not your twin)?
Crossing over
Segregation
All of these
Independent assortment
6
Attempts to breed horses and donkeys fail, due to gametic isolation.
False, they do breed infertile offspring successfully.
False, gametic isolation is only for plants.
True, there is no evidence of these two breeding.
None of these answers are correct.
7
Fossils are defined as evidence of organisms from at least 5,000 years ago.
True, and fossils are any type of evidence.
True, but no fossils have been found.
False, there is no evidence that old.
False, fossils are at least 10,000 years old.
8
Carbon atoms are used to form glucose during photosynthesis are derived from?
carbon dioxide
none of these
carbon monoxide
carbon in soil
9
Endosymbiotic theory explains
how mitochondria and chloroplasts originated
how bacterial cells can invade eukaryotics and cause disease
the origin of all organelles in eukaryotic cells
how eukaryotic cells consume food
10
The impact of a large meteorite with Earth would have most likely caused mass extinctions by
large clouds of dust to block out sun and destroy plants.
causing a prolonged rise in the earth's temperature only.
making large clouds of dust that block out sunlight only.
a prolonged rise temperature that destroys plant life.
11
Which are decomposers?
Fungi
Bacteria
both
neither
12
Which of the following can be a barrier to reproduction?
water, such as oceans or rivers that separate land species
All of these are barriers.
land forms, like mountains or gorges
inability of egg and sperm to fuse
13
If bull sperm can't fuse in a lab dish with 1 egg of a cow, the bull and cow show
temporal isolation.
hybrid infertility.
gametic isolation.
hybrid inviability.
14
2 populations of snails, separated by an impassable river, might undergo speciation due to __.
temporal isolation
both
habitat isolation
neither
15
Which is NOT an ethical concern involving biology?
creation of equity genes
discrimination against those who inherit disease genes
services that exclude citizens without wealth
inability to obtain health insurance

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