AnswersFL-2000310-Biology 1Cumulative Exam

Cumulative Exam — Cumulative exam Answers

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Kai looks at a photo of herself with her parents. She notices that, while her features are similar to her parents’ features, they do not appear to be identical. Which explains why this is the case?

A
Their DNA is made of different codon sequences.
B
Their DNA is made of four different bases.
C
Kai inherited more proteins from one parent than the other.
D
Kai inherited different amino acids from either of her parents.
42
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What happens to excess carbohydrates in animals?

A
They are stored as fat.
B
They are stored as protein.
C
They are stored in nucleic acids.
D
They are stored as sugar.
43

The first strands of DNA were observed through which microscope?

A
tunneling microscope
B
simple microscope
C
compound light microscope
D
electron microscope
44

Sucrose is made of which simple sugars?

A
glucose and fructose
B
fructose and galactose
C
galactose and cellulose
D
cellulose and glucose
45

Which is an example of a lipid?

A
cholesterol
B
glycerol
C
glycogen
D
proteins
46

What is the purpose of controlling the environment when testing a hypothesis?

A
It allows the scientist to determine the effect of the changed variable.
B
It allows samples and organisms to be tested under comfortable conditions.
C
It makes it easier for the scientist to perform the steps of the experiment.
D
It ensures that the scientist is undisturbed while performing the experiment.
47

Chemicals used in chemotherapy treatments to fight cancer can also harm cells in hair follicles and bone marrow. What characteristic do these cells most likely share with cancerous cells?

A
They form tumors.
B
They spread through the blood.
C
They divide rapidly.
D
They contain a mutation.
48

Drosophila eye color is an X-linked trait. Red eye color is dominant, and white eye color is recessive. Which Punnett square shows a cross in which the probability that offspring will be red-eyed males is 25 percent?

A
A Punnett square is shown. The columns are labeled Upper X r and Upper Y. The rows are labeled x Upper R and x Upper R. Clockwise, from top-left, the boxes include: X Upper R X r, X Upper R Y, X Upper R Y, X Upper R X r.
Option A
B
A Punnett square is shown. The columns are labeled Upper X r and Upper Y. The rows are labeled x Upper R and x r. Clockwise, from top-left, the boxes include: Upper X r Upper X r, Upper X r Upper Y, Upper X r Upper Y, Upper X r Upper X r.
Option B
C
A Punnett square is shown. The columns are labeled Upper X r and Upper Y. The rows are labeled x r and x r. Clockwise, from top-left, the boxes include: Upper X r Upper X r, Upper X r Upper Y, X r Upper Y, Upper X r Upper X r.
Option C
D
A Punnett square is shown. The columns are labeled Upper X Upper R and UpperY. The rows are labeled x r and x r. Clockwise, from top-left, the boxes include: Upper X r Upper X Upper R, Upper X r Upper Y, X r Upper X Upper R, Upper X r Upper X Upper R.
Option D
49

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. A parakeet that is heterozygous for blue feathers (dominant) is crossed with a parakeet that is homozygous for white feathers (recessive). According to the Punnett square for this cross, what percentage of offspring is predicted to have blue feathers?

Question illustration
A
25 percent
B
50 percent
C
75 percent
D
100 percent
50

How does the cell wall protect a plant cell?

A
The cell wall protects the cell by providing support and maintaining the cell's shape.
B
The cell wall protects the cell by storing food so the plant doesn't run out.
C
The cell wall is thin and flexible, which allows the cell to be moved without harming the organelles.
D
The cell wall is on the inside of the cell and serves to contain the contents of the cell.

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