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Unit B Flashcards

(30 cards)

1
Q

A Muskeg has *what* which keeps the soil from melting?

A

Permafrost.

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2
Q

In a taiga, what is the difference between Canopy and the Forest floor?

A

Canopy has the most sunlight and the forest floor is dark.

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3
Q

What part of a lake is the Limnetic Zone?

A

The middle zone between the Littoral Zone and the Profundal Zone. There is open water and enough sunlight for photosynthesis.

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4
Q

What is the difference between Grassland and Deciduous Forest?

A

Deciduous Forest has more precipitation than Grasslands.

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5
Q

What is a factor affecting aquatic systems?

A

Water pressure

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6
Q

What affects temperature and sunlight?

A

Seasons, water depth, hydrothermal vents

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7
Q

What’s the magic tempurature change number with the seasonal variations?

A

4*C

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8
Q

Surface water cools to 4*C and then what happens to O2?

A

O2 sinks down to the bottom.

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9
Q

BP-Birth potential, C-Capacity for survival, BF-Breeding frequency, M-Maturity

Larger mammals generally live longer than normal ones

A

C

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10
Q

BP-Birth potential, C-Capacity for survival, BF-Breeding frequency, M-Maturity

Pregnant female elephants carry their young for nearly 18 months.

A

BF

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11
Q

BP-Birth potential, C-Capacity for survival, BF-Breeding frequency, M-Maturity

Mice often produce litters of 6 or more

A

BP

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12
Q

BP-Birth potential, C-Capacity for survival, BF-Breeding frequency, M-Maturity

After about 6 weeks, mice reach sexual maturity

A

M

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13
Q

What is oligotrophic?

A

A deep, cold lake.

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14
Q

What is eutrophic?

A

A shallow, warm lake.

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15
Q

What is Taxonomy?

A

The science of classifying organisms.

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16
Q

Name the seven levels of classification in order.

A

Kingdom

Phyla

Class

Order

Family

Genus

Species

17
Q

What is Phylogeny?

A

The hystory of the evolution of a species.

18
Q

What is a Dichotomous Key?

A

A two-part key used to identify living things.

19
Q

What is Paleontology?

A

The study of fossils.

20
Q

How does Radiometric dating tell scientists the age of rock or fossil?

A

It changes a particular atom into a daughter isotope of the same or a different element

21
Q

What is an endemic?

A

A species found in one location only.

22
Q

What is a homologous feature?

A

Feature with a similar structure, but a different funtion

23
Q

What is a vestigial feature?

A

May have served a useful funtion once but not anymore.

24
Q

What was Buffon’s theory about evolution?

A

Species could change over time and these changes could lead to new organisms

25
What was Linnaeus's theory about evolution?
Thought that only a few species could reproduce
26
What was Erasmus Darwin's theory about evolution?
All life developed from a single source
27
What was Lamarck's theory?
Believed in Spontaneous generation, and inheritance of aquired traits. (That if a mother lost her arm, the baby would be born without an arm)
28
What was Darwin's Theory of Natural Selection?
Stronger individuals are better adapted to survive than weaker ones, over time species inherit traits that gives that species a survival advantage
29
What is a similarity between Lamarck and Darwin's theory?
They both knew that the encironment played an important role in evolution
30
What is the two theories for Rate of Evolution?
Theory of Gradualism: Idea that speciation takes place slowly Theory of Puntuated Equilibrium: Idea that species evolves rapidly, followed by a period of little or no change