Q: Which equation correctly represents the process of photosynthesis?

$$6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O} + \text{light energy} \rightarrow \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\ \mathrm{O}_2$$

Question 1

Which of the following best describes the difference between a community and an ecosystem?

Accepted Answer

A community includes all the populations of different species in an area, while an ecosystem includes both the community and the abiotic factors.

Question 2

Which of the following is an example of an abiotic factor affecting a biotic factor in an ecosystem?

Accepted Answer

A drought causing a decrease in the number of fish in a pond.

Question 3

In a food web, which of the following organisms could occupy multiple trophic levels?

Accepted Answer

An omnivore such as a bear.

Question 4

Which equation correctly represents the process of photosynthesis?

Accepted Answer

$$6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O} + 	ext{light energy} ightarrow \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\ \mathrm{O}_2$$

Question 5

A scientist observes that after the introduction of cane toads in Australia, the population of native insect-eating birds declines. What is the most likely explanation for this observation?

Accepted Answer

Cane toads compete with birds for insects, reducing the birds' food supply.

Question 6

Which of the following best describes the role of decomposers in an ecosystem?

Accepted Answer

They break down dead organic matter, recycling nutrients back into the ecosystem.

Question 7

Which of the following is the correct order of taxonomic classification from broadest to most specific?

Accepted Answer

Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species

Question 8

A dichotomous key is used to identify an unknown organism. Which of the following is a rule for constructing a dichotomous key?

Accepted Answer

Each step should offer two mutually exclusive choices.

Question 9

Which of the following is an example of a human activity that disrupts energy flow in a food web?

Accepted Answer

Overfishing a predatory fish species, causing prey populations to increase.

Question 10

Which of the following scientific names is written correctly according to binomial nomenclature conventions?

Accepted Answer

Homo sapiens

Question 11

A food chain is constructed as follows: Grass $$\rightarrow$$ Grasshopper $$\rightarrow$$ Frog $$\rightarrow$$ Snake. If the frog population is removed, what is the most likely immediate effect?

Accepted Answer

The grasshopper population will increase due to reduced predation.

Question 12

Which of the following best explains why scientific names are preferred over common names?

Accepted Answer

Scientific names are universal and reduce confusion across languages and regions.

Question 13

Which of the following is a correct equation for cellular respiration?

Accepted Answer

$$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\ \mathrm{O}_2 ightarrow 6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O} + 	ext{energy}$$

Question 14

Which of the following is NOT a reason why dichotomous keys are considered universal tools for scientists?

Accepted Answer

They rely on subjective descriptions.

Question 15

Which of the following is an example of a decomposer?

Accepted Answer

Mushroom

Question 16

A student is classifying an unknown animal with fur, gives birth to live young, and produces milk. To which class of vertebrates does this animal belong?

Accepted Answer

Mammalia

Question 17

Which of the following best describes the impact of introducing a non-native predator, such as the red fox, into an Australian ecosystem?

Accepted Answer

It can reduce populations of native species by predation and competition.

Question 18

Which of the following is an example of an ethical perspective influencing conservation decisions?

Accepted Answer

Choosing to protect a wetland because it provides habitat for endangered species.

Question 19

Which of the following is a correct sequence for a simple food chain?

Accepted Answer

Grass $$\rightarrow$$ Rabbit $$\rightarrow$$ Fox

Question 20

Which of the following actions can help reduce negative human impacts on ecosystems?

Accepted Answer

Restoring native vegetation in degraded areas.

Ecology, Classification, and Human Impacts: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards