Natural Selection Ch. 1-2 Review

A population can be described by:

• the traits present

• the number of individuals who have each trait

• the different species of organisms in it

• abiotic factors

Answer explanation

A population only has ONE kind of organism (species). Each organism of that population can have different traits. For example, a population of betta fish can have many different colors (traits).

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NGSS.MS-LS4-4

NGSS.MS-LS3-1

The number of individuals with each trait in

a population ________________ over time.

• can change

• stays the same

Tags

NGSS.MS-LS4-4

NGSS.MS-LS2-4

Over many generations, individuals with _______________ become more common in

a population, while individuals with _________________ become less common.

• adaptive traits ; non-adaptive traits

• non-adaptive traits ; adaptive traits

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NGSS.MS-LS4-4

The traits that __________________ in a population determine which traits can become more common over many generations.

• exist

• an organism wants

Tags

NGSS.MS-LS4-4

Whether or not a trait is adaptive depends on the _______________________.

Answer explanation

These 4 peppered moths are on dfferent parts of a tree. The environment that the moth is in determines if the moth wll be able to survive and reproduce. Which moth has an adaptive trait on the top part of the tree? Which moth has an adaptive trait on the bottom of the tree?

Tags

NGSS.MS-LS4-4

Biologists analyze data about __________________________ (the causes) to explain changes in ______________________________ (the effects).

• environmental conditions ; the distribution of traits in populations

• the distribution of traits in populations ; environmental conditions

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NGSS.MS-LS4-4

NGSS.MS-LS2-4

Instructions for making protein molecules

• nucleus

• chromosomes

• DNA

• genes

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NGSS.MS-LS3-1

Protein molecules determine an

organism's _________________.

• DNA

• chromosomes

• traits

• environment

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NGSS.MS-LS3-1

An organism's genetic information

• genotype

• phenotype

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NGSS.MS-LS3-2

An organism's observable physical traits

• genotype

• phenotype

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NGSS.MS-LS4-4