The four butterflies in the illustration represent the offspring in the F 1 generation. Which statement is best supported by the phenotypes of these offspring?

The F 1 generation is the result of a dihybrid cross.

The F 1 generation is composed only of males.

Two of the offspring in the F 1 generation will not be able to reproduce.

Two of the offspring in the F 1 generation will experience a spontaneous mutation

An analysis of DNA and RNA sequences can be used to classify organisms. A dendrogram, such as the one shown, is based on molecular data. It can be used to represent evolutionary relationships within a group of organisms that are hypothesized to have descended from a common ancestor. Which statement is best supported by the information in this dendrogram?

Lesser pandas are more genetically similar to raccoons than they are to giant pandas.

Lesser pandas are more genetically similar to giant pandas than they are to raccoons.

Brown bears are more genetically similar to giant pandas than they are to sun bears.

The bear species are all more genetically similar to dogs than they are to giant pandas.

Some students used vinegar to dissolve a way the shells of three eggs and used these eggs as models of human red blood cells. The students observed the changes in the eggs when they were placed in different solutions. Which statement best describes the role of the cell membrane in this model?

The cell membrane allows water to enter and leave the cell.

The cell membrane is an impermeable barrier that prevents water from entering the cell.

The cell membrane allows solutions to enter the cell, which causes the cell to shrink.

The cell membrane removes solutes from the environment.

Match the following functions to the biomolecule

Energy source (cellular respiration)

Marine scientists monitor atmospheric levels of carbon dioxide. As atmospheric levels rise, more of the gas dissolves in the oceans. Calcium carbonate (CaCO3) dissolves as more carbon dioxide enters the oceans. Marine organisms such as clams need CaCO3 to build their exoskeletons. Based on this information, which change is most likely to be a direct result of these increasing levels of oceanic carbon dioxide?

Many species of marine organisms will be weakened, making them unable to produce and maintain their shells

Frequent rainfall will dilute the effect of the carbon dioxide in the water

There will be an overpopulation of oysters and other shelled marine species.

The water level will rise and cause floods, damaging coastal ecosystems with contaminated water.

Scientists can measure the DNA content of cells by using a dye that binds to DNA. After treating a sample of cells with the dye, the dye will appear more intense in cells where the quantity of DNA is higher. During which stage or stages of the cell cycle would scientists observe the highest measurements of dye intensity?

from late S through G2 and mitosis

only during mitosis and cytokinesis

the entire time that the cell is in interphase

In a controlled experiment, a limited quantity of glucose was provided for cellular respiration. Researchers measured the quantity of reactants and products at the beginning of the experiment and again after 10 minutes. How will the quantities of glucose, oxygen, and carbon dioxide most likely change after 10 minutes have passed?

glucose will decrease oxygen will decrease carbon dioxide will increase

glucose will increase oxygen will increase carbon dioxide will decrease

glucose will decrease oxygen will increase carbon dioxide will increase

glucose will increase oxygen will decrease carbon dioxide will decrease

The homeostasis of an ecosystem is disrupted when decomposers are unable to perform which activity?

break down organic matter to release nutrients

absorb sunlight in order to produce proteins

recycle dissolved oxygen to reduce temperatures

transform nitrogen from the air into a usable form

As birds prepare for their migration, they go through many changes. Which equation shows the cellular process that occurs more as a bird prepares to fly thousands of kilometers?

6 H2O+2O2 + 6 CO → C6 H12O6+ 10 CO2

C6H12O6 + 10 CO2 → 6 H2O+2O2+ 16 CO

A student notices that many migrating birds that are flying south for the winter stop to rest and eat in South Carolina. The feeding of these migrant birds causes a temporary disturbance in the local ecosystem. The student hypothesizes that when the birds leave, stability will return to the ecosystem. Which statement best supports the student’s hypothesis?

The food sources are limited so the birds’ departure reduces the stress on the food sources.

The amount of space per organism is reduced so it stabilizes the environment.

As the birds leave for the winter there are fewer food sources available for other organisms.

When there are fewer organisms in the ecosystem, more water is available in the system to replenish the lakes and rivers.

Which of the following best describes the differences in function between enzymes and nucleic acids?

nucleic acids contain the genetic code for protein synthesis, while enzymes catalyze chemical reactions

nucleic acids are the building blocks of proteins while enzymes are used as the building blocks of phospholipids

nucleic acids inhibit chemical reactions, while enzymes provide structural support in cells

nucleic acids transmit signals that begin biochemical reactions, while enzymes convert carbohydrates to lipids and proteins

Which statement correctly compares a eukaryote and a prokaryote?

eukaryotes have membrane-bound organelles are prokaryotes have few specialized structures

eukaryotes have a cell wall while prokaryotes have a cell membrane

eukaryotes use active transport to move substances across a cell membrane, while prokaryotes use facilitated diffusion

eukaryotes use flagella to move themselves through substances, while prokaryotes can't move at all

A person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which of the following has occurred?

The water in the gums has moved out due to the high concentration of salt in the solution.

The swollen gums have absorbed the saltwater solution.

The saltwater solution lowers the temperature of the water in the gums.

The salt in the solution has moved against the concentration gradient.

During transcription the DNA base sequence is transcribed into a complimentary mRNA sequence. A codon table like the one shown below lists the amino acids coded for by particular triads of mRNA bases. A segment of DNA has undergone a mutation in which one nucleotide has been changed. The original sequence was ACG and the new sequence is ACA. Use the codon table to determine whether or not this mutation will cause a change in the phenotype of the organism

Even though the DNA sequence changed, the sequence still codes for the same amino acid, so no change in phenotype will occur.

yes, the phenotype of the organism would change because a new amino acid will be coded for.

yes, the phenotype of the organism would change because any change in the DNA sequence will cause a change in phenotype.

It is impossible to determine if a change in phenotype will occur using only the DNA sequence.

While genetic engineering has positive benefits, there are also concerns associated with widespread use of genetic engineering in agriculture. If many farmers begin to plant more genetically modified crops that have an increased tolerance to insects, which of the following may result?

a decrease in the genetic diversity of crops

an increase in the use of pesticides

an increase in the contamination of water supplies

a decrease in crop productivity

Before mitosis begins, which happens before the nucleus starts dividing?

The sister chromatids separate.

The homologous chromosomes cross over.

Before mitosis begins, which happens before the nucleus starts dividing?

The sister chromatids separate.

The homologous chromosomes cross over.

What is the function of autotrophs in the carbon cycle?

to use carbon dioxide to produce glucose

to use oxygen to produce glucose

What will most likely happen if the human population continues to grow at current rates?

There will be fewer natural resources available for future generations.

There will be an increase in nitrogen levels in the atmosphere.

There will be a decrease in water pollution.

There will be an increase in the number of strong hurricanes.

Which best represents one fundamental difference between the processes of mitosis and meiosis?

meiosis results in 4 haploid cells, mitosis results in 2 diploid cells

meiosis results in 4 haploid cells, mitosis results in 4 diploid cells

meiosis results in 2 diploid cells, mitosis results in 2 haploid cells

meiosis results in 2 diploid cells, mitosis results in 4 haploid cells

An analysis of DNA and RNA sequences can be used to classify organisms. A dendrogram, such as the one shown, is based on molecular data. It can be used to represent evolutionary relationships within a group of organisms that are hypothesized to have descended from a common ancestor. Which statement is best supported by the information in this dendrogram?

Lesser pandas are more genetically similar to raccoons than they are to giant pandas.

Lesser pandas are more genetically similar to giant pandas than they are to raccoons.

Brown bears are more genetically similar to giant pandas than they are to sun bears.

The bear species are all more genetically similar to dogs than they are to giant pandas.

The diagram shows a container divided into two compartments by a membrane permeable to water but not to starch. Two solutions containing different concentrations of dissolved starch were placed on each side of the membrane. Which of the following describes what will happen to the water level during the process of osmosis?

The water level on the left side of the membrane will increase

The water level of both sides of the membrane will decrease

The water level on the right side of the membrane will increase

The water level on both sides of the membrane will stay the same

An animal cell placed in a sugar solution is shown in the diagram. Which statement best describes how osmosis will affect this animal cell?

Water will move out of the cell and the cell will shrink

Water will move into the cell and the cell will expand

Sugar will move out of the cell and the cell will expand

Sugar will move into the cell and the cell will expand

The diagram shows the semipermeable membrane of a cell and the concentration of solutions inside and outside the cell. Which of the following statements best describes how the molecules will move?

Water molecules will move out of the cell

Water molecules will move into the cell

Solute molecules and water molecules will move out of the cell

Solute molecules and water molecules will move into the cell

A student noticed that the freshwater plant, Elodea, produced bubbles when placed in direct light. What could the student most likely conclude?

Bubbles of oxygen were produced as a result of photosynthesis.

Bubbles of carbon dioxide were produced as a result of photosynthesis.

Bubbles of carbon dioxide were produced as a result of cellular respiration

Bubbles of oxygen were produced as a a result of cellular respiration

Many lawn grasses turn brown during hot, dry periods in summer. Their roots send up new green shoots during cool, damp periods in fall. The grasses turn brown again during cold winter weather and send up new shoots again in spring. Which statement BEST describes how these lawn grasses are adapted to seasonal changes?

The grasses become dormant to survive unfavorable environmental conditions.

The grasses die off in summer and winter and grow from seeds in fall and spring.

The grasses become dormant to survive summer drought and grow from seeds in spring.

The grasses die off during unfavorable environmental conditions.

A researcher observes that a skin cell is dividing faster than the skin cells around it. What has most likely to cause the skin cell to divide quickly?

The cell has become a cancerous cell because it is not progressing like the cells around it.

The cell has become a stem cell because it is different from the cells around it.

The cell has differentiated into a new cell type because it is acting different than the cells around it.

The cell has evolved because it is behaving in a way that is unique to the cells around it.

Final Biology Review

Quiz

•

Science

•

9th Grade

•

Practice Problem

•

Hard

•

NGSS

HS-LS1-5, HS-LS2-5, HS-LS2-3

+25

Standards-aligned

Christopher Powers

FREE Resource

61 questions

Show all answers

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

The four butterflies in the illustration represent the offspring in the F₁ generation. Which statement is best supported by the phenotypes of these offspring?

The F₁ generation is composed only of males.

Two of the offspring in the F₁ generation will not be able to reproduce.

The F₁ generation is the result of a dihybrid cross.

Two of the offspring in the F₁ generation will experience a spontaneous mutation

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

The initial steps in gene expression are modeled. Double-stranded DNA first unwinds into two strands. Which process and product are represented in the diagrams?

Process: transcription; product: mRNA

Process: translation; product: protein

Process: replication; product: tRNA

Process: recombination; product: polymerase

Tags

NGSS.HS-LS1-1

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Name the process in the picture.

transcription

mitosis

translation

replication

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Name M.

light dependent cycle

Carbon dioxide

glucose

Calvin cycle

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Name B.

phosophate

glucose

deoxyribose

nitrogen base

Tags

NGSS.HS-LS1-1

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

The diagram represents one way an enzyme can be inhibited. Which statement explains the effect of an inhibitor on an enzyme?

A substrate will be able to bond with the enzyme.

The enzyme will likely be attacked by immune cells

The enzyme will be unable to produce more enzymes.

A substrate will be unable to attach to the enzyme.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Food webs such as the one shown were first used in 1927 by the animal ecologist Charles Elton. The food web below represents the feeding relationships among organisms in an Alaskan ecosystem. An environmental change that removed which of these organisms from the ecosystem would cause the most instability in the ecosystem?

Auklets

Foxes

Salmon

Zooplankton

Tags

NGSS.HS-LS2-2

NGSS.HS-LS2-3

NGSS.HS-LS2-6

NGSS.HS-LS4-5

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Final Biology Review

61 questions

The four butterflies in the illustration represent the offspring in the F1 generation. Which statement is best supported by the phenotypes of these offspring?

The initial steps in gene expression are modeled. Double-stranded DNA first unwinds into two strands. Which process and product are represented in the diagrams?

Name the process in the picture.

Name M.

Name B.

The diagram represents one way an enzyme can be inhibited. Which statement explains the effect of an inhibitor on an enzyme?

Some students used vinegar to dissolve a way the shells of three eggs and used these eggs as models of human red blood cells. The students observed the changes in the eggs when they were placed in different solutions. Which statement best describes the role of the cell membrane in this model?

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The four butterflies in the illustration represent the offspring in the F₁ generation. Which statement is best supported by the phenotypes of these offspring?