AnswersLA-Biology B-CRCumulative Exam

Cumulative Exam — Cumulative exam Answers

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Which description is correct for both oogenesis and spermatogenesis?

A
The cells have 46 chromosomes until meiosis II is completed.
B
After meiosis I, the cells have 23 chromosomes.
C
Part of meiosis I is completed before birth.
D
The entire process takes about 70 days.
42
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While traveling across the Atlantic, a scientist encountered an unfamiliar lizard. He used a classification tool that relied on observable features to determine its species. Once he knew the species, he could learn more about the type of environment the lizard was adapted to.Which best describes the purpose of identifying the lizard?

A
for satisfying curiosity and understanding how organisms interact
B
for identifying ecosystems and classifying organisms
C
for studying biodiversity and understanding how organisms interact
D
for classifying organisms and studying biodiversity
43

The development of the theory of evolution had many contributors. Which lists these contributors in chronological order?

A
Erasmus Darwin, Greeks and Romans, Lamarck, Malthus, Charles Darwin
B
Lamarck, Malthus, Greeks and Romans, Erasmus Darwin, Charles Darwin
C
Greeks and Romans, Erasmus Darwin, Lamarck, Malthus, Charles Darwin
D
Greeks and Romans, Lamarck, Erasmus Darwin, Malthus, Charles Darwin
44

Millions of species exist today. Based on Charles Darwin's theory of evolution, which of the following best explains how this is possible?

A
Organisms pass on acquired traits to evolve into more advanced life forms.
B
Organisms are selectively bred to create new species.
C
New species are crossed with each other to form many different organisms.
D
Different genetic variations in organisms are selected in different habitats.
45

Before the beginning of the Industrial Revolution, most peppered moths found in and around Manchester, England, exhibited light-colored wings speckled with black. After the Industrial Revolution, peppered moths with dark wings became predominant in the area.Which term best describes the change from more light-colored moths to more dark-colored moths?

Question illustration
A
competition
B
evolution
C
acquired
D
overpopulation
46

There is an algal bloom in a bay in a populated area. As the leading marine biologist in the area, what is the most important thing to do, based on scientific evidence about such blooms?

A
warn people about which food is safe to eat
B
develop a strategy to prevent future algal blooms
C
encourage people to go clean the affected area
D
evacuate all wildlife from the bay
47

Which is an advantage of flowering plants?

A
Flowers attract insects that transport gametes.
B
Flowers give greater access to sunlight.
C
Flowers help transport water and nutrients.
D
Flowers assist plants that live in the water.
48

Which scientist disproved the idea that life comes from nonlife?

A
Anton van Leeuwenhoek
B
Louis Pasteur
C
Robert Koch
D
Paul Ehrlich
49

Which enzymes are secreted only by the pancreas?

A
nucleases
B
amylase and proteases
C
lipases
D
amylase, proteases, lipases, nucleases
50

What is the relationship between coronary artery disease and a heart attack?

A
Coronary artery disease is a symptom of heart attacks.
B
Heart attacks reduce blood flow to the heart and cause coronary artery disease.
C
Coronary artery disease can reduce blood flow to the heart and cause heart attacks.
D
Heart attacks occur when coronary artery disease is treated.

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