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Science 7 > final 7th > Flashcards

final 7th Flashcards

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Biology 101 flashcards
1
Q

What did Mendel use for his tests of heredity

A

pea plant

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2
Q
  1. What is a description of the alleles present in an individual
A

Genotype

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3
Q

What is a tool that would help predict patterns of heredity?

A

Punnett square

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4
Q

What is Phenotype

A

The observable traits of and organism passed on from parents to offspring

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5
Q

If a gene was homozygous recessive, how would you represent it?

A

2 lowercase letters that are the same - aa

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6
Q

How many copies of alleles does each person have

A

2

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7
Q

If a gene was heterozygous, how would you represent it?

A

A capital letter and a lowercase letter - Aa

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8
Q

What does heterozygous mean?

A

different

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9
Q

What is carrying capacity

A

Size of population that is supported by resources in a given location

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10
Q

What usually happens to a population of organisms when the region’s carrying capacity has been reached

A

It levels off

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11
Q

What is an ecosystem?

A

All the living and nonliving things in a area

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12
Q

What are populations influenced by?

A

Prey, water, sunlights, shelter, and other resources

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13
Q

Explain the relationship between population and community and ecosystem.

A

A population is different species that come together to form a population, multiple populations that interact with each other to make a community, and communities interact with all living and nonliving things to make an ecosystem

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14
Q

What happens when the needs of species are no longer met?

A

They migrate or die

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15
Q

What are some causes of extinction

A

Lack of resources, or habitat loss

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16
Q

When does overpopulation of species occur

A

species exceed carrying capacity

17
Q

Why is overpopulation so dangerous

A

it overtakes the ecosystem and messes up the food web

18
Q

What is the most common effect of overpopulation?

A

Starvation

19
Q

What happens if an ecosystem is left alone

A

It will balance out

20
Q

What happens when population numbers increase?

A

resources are used up at a greater rate and will eventually run short

21
Q

What molecule is most responsible for the adverse effects of pollution and deforestation on Earth’s climate?

A

Carbon Dioxide

22
Q

What is global warming

A

The slow warming of earth’s atmosphere due to climate change

23
Q

What does anthropogenic mean?

A

caused by humans

24
Q

What does anthropogenic mean?

A

caused by humans

25
Q

What are the greenhouse gasses?

A

Carbon Dioxide, methane and water vapor

26
Q

What is happening to the weather that is a sign of climate change

A

extreme storms

27
Q

What is a water cycle?

A

The movement of water among the various reservoirs of water around the planet

28
Q

What is the most important source of energy that drives the water cycle

A

The sun

29
Q

What are the basic forces that drive the water cycle

A

gravity and bouyancy

30
Q

What does the global wind system and the resulting currents in Earth’s oceans move around the planet?

A

Thermal energy and moisture

31
Q

What is precipitation?

A

Water that is released from clouds in the sky for example, rain, snow, and sleet.

32
Q

What are temperatures affected by

A

Season and the water cycle

33
Q

What is a meteorologist

A

Someone who studies weather

34
Q

Name some of the tools they use

A

Thermometer, barometer, anemometer, and rain gauge

35
Q

What is a front?

A

The boundary between two masses with different properties

36
Q

When do clouds and rain often form?

A

when air contains as much water vapor as it can hold

37
Q

Why do clouds and rain form?

A

When these water droplets get too heavy to stay suspended in the cloud, they fall to Earth as rain.

Science 7 (2 decks)

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