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Breifly explain how one genotype is used to create hundreds ofdifferent cell phenotypes for multicellular organisms.

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Nelly Stracke
Nelly StrackeLv2
29 Sep 2019
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1. Late stage succession communities typically: a) contain more equilibrial than opportunistic species b) are more diverse than disturbed communities c) are more diverse than early stage succession commmunities d) contain more opportunistic species than equilibrial species e) suffer higher rates of disturbance

2. Phenotypic plasticity is when: a) Organisms adapt their genotype to the local environment b) Individuals with different phenotypes show plasticity in their size c) Organisms with different genotype express different phenotypes in the same environment d) Plasticity in the environment causes different genotypes to survive leading to different phenotypes e) Organisms express different phenotypes depending on the local environment but have the same genotype

3. Terrestrial areas that are saturated with water, either permanently or seasonally, are typically known as what type of ecosystem. f) Grasslands g) Heathlands h) Litholands i) Wetlands j) Littoral

4. Briefly explain two ways that excess climate gas emissions are changing the worldҀ™s physical environment

57. (4 pts) Multicellular organisms can selectively remove unnecessary cells using a cellular suicide process. What is this process called? Briefly describe or use a figure to show how the pathway is activated when a survival signal is no longer supplied to a cell.

1. You observe that small crustaceans swimming through a sample of ocean water set off light production, but your first guess is that this is due to some bacterium, since bacteria are so metabolically diverse. True or false

2. How did multicellular organisms evolve from unicellular organisms?

Single-celled organisms joined together, or failed to separate after cell division.

Single-celled organisms joined together only.

Single-celled organisms failed to separate after cell division only.

Single-celled organisms joined together, or absorbed other species by endosymbiosis.

One species absorbed another species by endosymbiosis only.

3.Cooperation between or among cells could have been a key step in the evolution of multicellularity.

True

False

4. Autotrophs must acquire carbon from organic molecules produced from other organisms.

True

False

5. The protists, though now known to have multiple origins, were first group due to their being aquatic, and, most of them, quite small.

True

False

6. You are analyzing samples under a microscope, and one sample coming from what you suspect is a fungus. You find tiny filaments, which, in your report, you call

hyphae.

spores.

fruiting bodies.

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organelles

composition of cell wall

photosynthesis

reproductive structures

multicellular vs. unicellular

gills.

chitin.

8.

You are studying two populations of dung beetles, one of which rolls their dung balls at noon, resting at night, and the other of which reverses this. These could speciate due to

behavioral isolation.

gametic isolation.

mechanical isolation.

temporal isolation.

sexual selection.

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