What are the main components of DNA?

Phosphates, Deoxyribose sugars, nitrogen bases

Deoxyribose sugars, salt, sugar, nitrogen bases

This picture shows Rosalind Franklin's x-ray diffraction image of DNA. How did this evidence affect the work of Watson and Crick?

It was used to discover physical structure of DNA

It was used to show that chromosomes are made of DNA.

It was used to identify the four bases that make up DNA.

It was used to show that DNA is the molecule of inheritance.

How can genetic variation be introduced into a population of asexual organisms as bacteria?

Mutations occur randomly in bacterial DNA.

Bacterial change and begin to reproduce sexually.

The environment where the bacteria lives changes the bacteria change.

A bacteria receives genetic information from both parent cells.

"Mutations are random. Natural selection is not." Which of the following statements does not this support conclusion?

Mutations are caused by changes in the environment.

Mutations for positive traits are more likely to be passed on to the next generation.

The environment determines if a mutation is positive, negative, or neutral.

Natural selection favors some mutations and not others.

Which statement is false about mutations?

Mutations are adaptations to the environment.

Mutations are a change in the genotype of an organism.

Mutations are always a change in an organism's DNA.

Which question about tulips could best be answered by scientific research?

What genes determine tulip petal color?

Are tulips better than other flowers?

Why do people like to look at tulips?

Which color of tulips is the prettiest

A student plans to conduct an experiment to see how quickly mice learn to navigate a maze to reach a reward at the other end. Which of these will help lead to the MOST accurate conclusion?

use the same maze and reward each day

Which is false about mutations?

Mutations are adaptations to the environment.

Mutations are a change in the genotype of an organism.

Mutations are always a change in an organism's DNA

Which is false about mutations?

Mutations occur when DNA comes from another source other than parents.

Mutations are a change in the genotype of an organsim.

Mutations are always a change in an organism's DNA

What can cause an offspring to have a physical trait neither of its parents have?

a mutation in a parent's sex cell

a mutation in a parent's body cell

the artificial selection of a trait.

The Punnett square shows the cross between cabbage butterflies. B=white and b= yellow. Why are all the offspring white?

Only one parent butterfly carried recessive yellow traits.

Both parent butterflies were dominant for white color.

Only one parent carried dominant and recessive color genes.

Both parent butterflies carried recessive genes for yellow color.

The picture shows a kitten, along with its parents. Why does the kitten appear to be different from either parent?

The kitten gets half its traits from both parents, and this creates variety.

The kitten did not have the proper nutrition during development.

The kitten has a disease that makes it look different from its parents.

The kitten is not fully grown and will soon look identical to one of the parents.

The picture shows a mother and father zebra with an albino offspring. Albino animals have no pigment in their skin. Which of the following BEST explains how this occured?

The albino offspring is a result of random mutation in the genes that control skin color.

The albino offspring's fur and skin fade easily in the African sun.

The gene for albinism is a common dominant gene.

The albino has eaten certain plants that have chemically caused its skin and fur to fade.

What most likely happened to species that are found in the fossil record but have no living members?

They had offspring of a different species.

Which process best explains how antibiotic resistance in bacteria can occur?

Bacteria that already have a genetic resistance to an anticiotic will survive and pass on the resistance to their offspring.

Bacteria gradually become more resistant to an antibiotic and pass on their resistance to their offspring.

While being treated with an antibiotic, some bacteria will become stronger and survive to pass on the resistance to their offspring.

A patient becomes resistant to antibiotics, depending upon the conditions of the hospital.

7th grade CSA 3rd nine weeks review

Authored by Nancy Diggs

Science

7th Grade

NGSS covered

Used 25+ times

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32 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the models most accurately represent the structure of DNA?

Tags

NGSS.HS-LS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best represents amolecule of DNA?

Tags

NGSS.HS-LS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

This is a

nucleus

gene

chromosome

DNA

Tags

NGSS.HS-LS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

This is where the gene is located and the blueprint of life. What is it?

Chromosome

gene

nucleus

DNA

Tags

NGSS.HS-LS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which characteristic is controlled by the gene?

How long their eyelashes are.

How funny their jokes are.

How many friends they have

What type of ice cream they like

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Tightly wound bundles of DNA are called

Chromosomes

Nuclei

Phosphates

Punnett

Squares

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What forms the chemical code within a molecule of DNA?

The arrangement of phosphates and sugars

The arrangement of nitrogen bases

The arrangement of sugar and bases

The arrangement of chromosomes

Tags

NGSS.HS-LS1-1

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