AnswersSnider - Biology Living Earth B Summer 2026Unit Test

Unit Test — Cumulative exam Answers

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Which organ systems work together to help the body shiver in order to maintain homeostasis?

A
circulatory and respiratory
B
nervous and muscular
C
circulatory and muscular
D
respiratory and nervous
22
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Tissue cultures (samples of cancer cells) are taken from cancer patients, and the cells are then grown in a laboratory. What is the purpose of growing cancer cells in a laboratory?

A
to test medicinal treatments before giving them to patients
B
to replace cancer cells with healthy cells
C
to provide evidence of cancer cells in the patient
D
to stop the cancer from growing in the patient
23

Which structure will form when a primitive cell engulfs an aerobic bacterium?

A
mitochondria
B
chloroplast
C
nucleus
D
cell membrane
24

A conservation biologist has determined the status of the ecosystems in a protected area, as shown in the table below. Based on the table, which part of the pie chart represents secondary succession?Status of ecosystemsPercentage of protected areaPrimary succession10Secondary succession30Barren land5Established community55

Question illustration
A
segment A
B
segment B
C
segment C
D
segment D
25

Consider the recent phylogenetic tree of five different organisms. Old classification systems based on physical characteristics would most likely disagree with the relationship between which two animals in the tree?

Question illustration
A
crocodiles and insects
B
bats and humans
C
birds and bats
D
humans and crocodiles

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