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Biology LEAP 2025 Review

Total questions: 15

Worksheet time: 45mins

Name
Class
Date
1.

What is cellular respiration?

a)

A process that converts glucose and oxygen into energy (ATP), carbon dioxide, and water.

b)

A method of photosynthesis in plants.

c)

A way for cells to reproduce and divide.

d)

A technique for storing energy in fat cells.

2.

Give an example of mutualism.

a)

The relationship between colobus monkeys and fig trees, where monkeys eat the figs and help disperse the seeds.

b)

The relationship between a lion and a zebra, where the lion hunts the zebra for food.

c)

The relationship between a bee and a flower, where the bee collects nectar and pollinates the flower.

d)

The relationship between a shark and a remora fish, where the remora cleans the shark's teeth.

3.

What is exponential growth in a population?

a)

Exponential growth occurs when a population increases rapidly due to abundant resources, leading to a J-shaped growth curve.

b)

Exponential growth is a slow increase in population size due to limited resources.

c)

Exponential growth refers to a steady decline in population over time.

d)

Exponential growth happens when a population remains constant despite resource availability.

4.

What gas is produced during photosynthesis?

a)

Carbon Dioxide

b)

Nitrogen

c)

Oxygen

d)

Hydrogen

5.

What is photosynthesis?

a)

The process by which plants absorb water from the soil.

b)

The process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose, using carbon dioxide and water, and releasing oxygen as a byproduct.

c)

The method by which animals convert food into energy.

d)

The way in which plants grow towards sunlight.

6.

What is the difference between immigration and emigration?

a)

Immigration is the movement of individuals into a population, while emigration is the movement of individuals out of a population.

b)

Immigration is the movement of individuals out of a population, while emigration is the movement of individuals into a population.

c)

Immigration refers to the legal process of obtaining citizenship, while emigration refers to the illegal movement of people across borders.

d)

Immigration and emigration are terms that refer to the same process of moving between countries.

7.

What is a food web?

a)

A simple chain of organisms that eat one another.

b)

A complex network of interconnected food chains in an ecosystem, showing how different organisms are related through feeding relationships.

c)

A diagram that shows the energy flow in a single species.

d)

A list of all the plants and animals in a specific area.

8.

In which type of cell would you observe a cell plate during mitosis?

a)

Animal cells

b)

Fungal cells

c)

Plant cells, such as onion root cells

d)

Bacterial cells

9.

What is a food chain?

a)

A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.

b)

A food chain is a circular pattern of energy flow in an ecosystem.

c)

A food chain is a list of all the organisms in a habitat.

d)

A food chain is a method of food preservation used in cooking.

10.

What is logistic growth in a population?

a)

Logistic growth occurs when a population grows exponentially without limits.

b)

Logistic growth occurs when a population's growth slows as it approaches the carrying capacity of its environment, resulting in an S-shaped growth curve.

c)

Logistic growth is characterized by a constant rate of growth regardless of population size.

d)

Logistic growth happens when a population decreases due to limited resources.

11.

What is mutualism?

a)

A relationship where one species benefits at the expense of another.

b)

A symbiotic relationship where both species benefit from the interaction.

c)

A type of competition between two species for resources.

d)

A relationship where both species are indifferent to each other.

12.

What is the difference between photosynthesis and cellular respiration?

a)

Photosynthesis converts light energy into chemical energy and releases carbon dioxide, while cellular respiration breaks down glucose to release energy and produces oxygen.

b)

Photosynthesis converts light energy into chemical energy (glucose) and releases oxygen, while cellular respiration breaks down glucose to release energy (ATP) and produces carbon dioxide.

c)

Photosynthesis and cellular respiration are identical processes that both produce glucose and oxygen.

d)

Photosynthesis occurs in the mitochondria, while cellular respiration occurs in the chloroplasts.

13.

What is a cell plate and when is it formed?

a)

A structure that forms during cytokinesis in animal cells, leading to the separation of the two daughter cells.

b)

A structure that forms during cytokinesis in plant cells, leading to the separation of the two daughter cells.

c)

A structure that forms during interphase, preparing the cell for division.

d)

A structure that forms during mitosis, ensuring the equal distribution of chromosomes.

14.

What is the role of decomposers in an ecosystem?

a)

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

b)

Decomposers produce energy through photosynthesis.

c)

Decomposers compete with producers for sunlight.

d)

Decomposers are primary consumers that eat plants.

15.

What is the carrying capacity of an environment?

a)

The maximum number of individuals of a species that an environment can sustainably support.

b)

The total biomass of all species in an environment.

c)

The minimum number of individuals required for a species to survive.

d)

The average number of individuals in a population over time.