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Bio 20 > Unit B > Flashcards

Unit B Flashcards

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Biology 101 flashcards
1
Q

What are the different mutations?

A

Neutral, beneficial, harmful

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2
Q

What are the layers of soil?

A

Litter, topsoil, subsoil and bedrock

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3
Q

What is subsoil made up of?

A

Mostly rock, less organic matter

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4
Q

What is birth potential?

A

The maximum number of offspring per birth

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5
Q

What’s a sibling?

A

Offspring from the same or one similar parent

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6
Q

What does density dependant mean?

A

Affects a population because if the density of the population

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7
Q

What is clear cutting?

A

Removal of all trees in an area

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8
Q

What is ecology?

A

The study of interactions between organisms and their living and nonliving environment

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9
Q

What type of mutation is rare?

A

Beneficial

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10
Q

When temp goes up what happens to oxygen levels?

A

They go down

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11
Q

During summer, what is the top layer of s lake?

A

Epilimnion

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12
Q

What is a homologous feature?

A

Feature similar structure but different functions

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13
Q

What are chromosomes?

A

They are packages of genes?

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14
Q

What does the theory if gradualism state?

A

The idea that speciation takes place slowly

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15
Q

What is a niche?

A

An organisms role is their ecosystem

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16
Q

What are four factors that effect a terrestrial ecosystem?

A

Soil, available water, temperature, sunlight

17
Q

What biome has a low drainage rate?

A

Muskeg

18
Q

What is a canopy?

A

Upper layer of vegetation in a forest

19
Q

What are Canada’s aquatic biomes?

A

Freshwater and marine or salt water

20
Q

What are the three aquatic zones?

A

Littoral, limnetic, and profundal

21
Q

Does cold or warm water hold more dissolved oxygen?

A

Cold

22
Q

What is a carrying capacity?

A

The maximum number of individuals of a species that can be supported at one time by an ecosystem

23
Q

Is disease an abiotic or biotic factor?

A

Biotic

24
Q

What are 3 density independent factors?

A

Flood, fire, drought

25
Q

What is the law of minimum?

A

The nutrient supply in least supply limits growth

26
Q

How are DNA, genes and chromosomes connected?

A

DNA -> genes -> chromosomes

27
Q

What’s n endemic?

A

A term used to describe s species that is found in one location only

28
Q

Which scientist worked with Charles Darwin?

A

Wallace

29
Q

Where did Wallace study?

A

Malaysia

30
Q

What’s allopatric speciation?

A

Speciation by reproductive isolation

Bio 20 (1 decks)

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