Life Science Test

Examine the Punnett square showing the inheritance of flower color in plants.

If (R) represents the dominant color red, and (r) represents the recessive color white, what is the possibility that the two plants will have white offspring?

• 0%

• 50%

• 75%

• 100%

In chickens, rose comb is dominant over single comb. If a homozygous rose comb male is crossed with a heterozygous female, what percentage of the offspring would likely have a rose comb?

• 0%

• 25%

• 75%

• 100%

Which processes are responsible for cell growth and reproduction?

• mitosis and meiosis

• mitosis and osmosis

• meiosis and photosynthesis

• osmosis and photosynthesis

Tags

NGSS.MS-LS3-2

NGSS.MS-LS1-5

What does the genotype for a trait BB represent?

• Each letter represents the dominant allele inherited from each parent.

• Both letters represent the dominant allele inherited from the mother.

• Both letters represent the recessive allele inherited from the father.

• Each letter represents the recessive allele inherited from each parent.

Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?

• 25%
• 1%
• 10%
• 0%

Tags

NGSS.HS-LS3-3

What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness? 

• 0 in 4
• 1 in 4
• 2 in 4
• 4 in 4

Tags

NGSS.HS-LS3-3

NGSS.HS-LS3-1

What would most likely happen if an ecosystem no longer received sunlight?

• The number of herbivores would increase
• The number of plants would increase
• all organisms would adapt
• All living organisms would eventually die

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Scientists have developed cold-resistant plants by introducing the gene from cold-water fish that keeps them from freezing. These genetically modified plants are able to tolerate cold temperatures.Which statement is the most logical argument in favor of the development of such genetically modified plants?

• It reduces cases of pest infection in the plants.

• It increases the nutritional value of the plant products.

• It allows the plants to be grown in a wider variety of environments.

• It ensures that the plants can be grown without fertilizers.

Sickle cell anemia is a recessive genetic disease that is caused by a mutation in a gene on chromosome 11. The disease reduces the efficiency of the red blood cells’ ability to transport oxygen. A student makes a claim that the gene mutation leading to sickle cell anemia can be beneficial to humans. The table lists the statements given by the student to support the claim.

Which statement given by the student supports the claim made?

• Statement 1

• Statement 2

• Statement 3

• Statement 4

Use the graph that shows the population sizes of two species of fish in a pond measured every 10 years from 1800 to 1970 to answer question the question.

Which term best describes what happened to Species 2 between 1880 and 1950?

• adaptation

• classification

• evolution

• extinction

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4