Question 1

Which of the following is NOT one of the seven characteristics common to all living organisms?

Accepted Answer

Photosynthesis

Question 2

A scientist observes that a population of bacteria doubles every hour under ideal conditions. Which type of population growth does this represent, and what is the general equation for this growth?

Accepted Answer

Exponential growth; $$N(t) = N_0$ e$$^{rt}$$

Question 3

Which of the following best describes the role of a keystone species in an ecosystem?

Accepted Answer

A species with a disproportionate effect on overall species diversity

Question 4

If the atmospheric concentration of methane ($$CH_4) $$increases, which of the following is most likely to occur?

Accepted Answer

Global warming potential will increase, contributing to climate change

Question 5

Which process in photosynthesis directly captures energy from sunlight?

Accepted Answer

Light reactions in the chloroplasts with chlorophyll

Question 6

A population of alpine plants is being outcompeted by plants from lower elevations due to warming temperatures. Which ecological concept does this scenario best illustrate?

Accepted Answer

Competition

Question 7

Which of the following is a correct statement about cellular respiration?

Accepted Answer

It breaks down sugars to release energy for biological processes

Question 8

If a defect in photosynthesis blocked the Calvin cycle, which molecules would NOT be made?

Accepted Answer

Sugar

Question 9

Which of the following best describes homeostasis in living organisms?

Accepted Answer

The process by which a cell or organism maintains equilibrium

Question 10

Which of the following is a major greenhouse gas with a much higher global-warming potential than $$CO_2$$?

Accepted Answer

$$CH_4$$

Question 11

Which of the following is an example of mutualism affected by climate change?

Accepted Answer

A bird and a pollinator flower whose interaction timing is altered by climate change

Question 12

What is the main difference between exponential and logistic population growth?

Accepted Answer

Logistic growth levels off due to limiting factors, exponential growth does not

Question 13

Which of the following is NOT a biogeochemical cycle?

Accepted Answer

Energy flow

Question 14

Which of the following statements about viruses is TRUE according to the study materials?

Accepted Answer

Viruses reproduce by making clones of their genetic material

Question 15

Which of the following is a correct equation for photosynthesis?

Accepted Answer

$$CO_2 + H_2O$$ \xrightarrow{light} C_6H_{12}$$O_6$$ + $$O_2$$

Question 16

Which of the following is a consequence of removing sea otters from kelp forest ecosystems?

Accepted Answer

Decrease in kelp abundance due to unchecked sea urchin populations

Question 17

Which of the following is a 2nd generation biofuel?

Accepted Answer

Biofuels from cellulose and wood

Question 18

Which of the following best describes the concept of ecological footprint?

Accepted Answer

The amount of land, water, and fuel required to sustain one person

Question 19

Which of the following is an example of a trophic cascade?

Accepted Answer

Removal of apex predators leading to changes in lower trophic levels

Question 20

Which attribute is NOT a characteristic of scientific theory?

Accepted Answer

Opinion-based

General Biology: Characteristics of Life, Ecosystems, and Climate Change

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