Question 1

An ecosystem is made up of ____.

Accepted Answer

An ecosystem includes both living organisms (organisms) and nonliving things (such as water, soil, and air). Therefore, option B is the correct answer. Option A, D, and E are incorrect because they only list some of the living organisms found in an ecosystem. Option C is incorrect because it only lists nonliving things found in an ecosystem.

Question 2

Lipids, proteins, DNA, RNA, and complex carbohydrates are all ____.

Accepted Answer

Lipids, proteins, DNA, RNA, and complex carbohydrates are all considered molecules, which are made up of atoms bonded together. None of the other choices accurately describe these biomolecules.

Question 3

Which of the following is a basic component of all of the others?

Accepted Answer

All of the other choices (organs, tissues, organism, and organ systems) are made up of cells. Cells are the basic building block of life and make up all living things.

Question 4

What name is given to the scientific study of life?

Accepted Answer

Biology is the scientific study of life, including all living organisms and their interactions with the environment. Geography is the scientific study of the physical features of the earth and its atmosphere, while statistics is the study of the collection, analysis, interpretation, presentation, and organization of data. Ecology is the study of the relationships between living organisms and their environment, and geology is the study of the Earth's physical structure, processes, and history.

Question 5

The dynamics of an ecosystem depends on two main processes, which are ____.

Accepted Answer

The dynamics of an ecosystem depends on two main processes, which are the unidirectional flow of energy (from the sun to producers to consumers and eventually to decomposers) and the cycling of nutrients (such as carbon, nitrogen, and phosphorus) through the food web and back into the environment. Both processes are essential for maintaining the balance and stability of an ecosystem.

Question 6

The DNA molecule is most similar functionally to a ____.

Accepted Answer

A cookbook contains instructions or recipes for creating something, just as DNA contains instructions for creating proteins and ultimately, an organism.

Question 7

Which of the following represents an activity within a population?

Accepted Answer

The answer of Which of the following represents an activity...

Question 8

Living organisms are members of all of the following levels. However, soil is a component of ___.

Accepted Answer

Soil is considered a component of the ecosystem, as it is a physical environment in which living organisms interact with each other and their surroundings. The community refers to all of the interacting populations within an ecosystem, while the population refers to all of the individuals of a single species within an ecosystem. The biosphere refers to all of the Earth's ecosystems collectively.

Question 9

The emergent property of "life" appears at the level of the ____, when many molecules become organized.

Accepted Answer

Life emerges at the level of the cell, which is when many molecules become organized into a self-contained and self-replicating unit. Population and community refer to groups of organisms, while atoms are the building blocks of molecules and do not have the emergent property of life. While organisms are composed of cells, the emergence of life happens at the cellular level.

Question 10

The species extinctions taking place today are being caused by ____ activities.

Accepted Answer

The phrase "human activities" refers to the actions of Homo sapiens, which include habitat destruction, overexploitation, pollution, and climate change, among others. These actions have led to the decline and disappearance of many species around the world, making this the sixth mass extinction event in Earth's history. The other choices (B, C, D, E) do not have a direct connection with the current extinction crisis, although they can affect biodiversity in other ways.

Question 11

A population is composed of individuals of ____.

Accepted Answer

A population is defined as a group of individuals of the same species living in the same geographic area. This excludes the possibility of different species or nonliving things being part of the population.

Question 12

Which of the following characteristics are shared by all living organisms?
I. hereditary information is passed to offspring
II. adaptation to environmental change
III. requirement for nutrients
IV. DNA housed in a nucleus

Accepted Answer

All living organisms share the characteristics of hereditary information being passed to offspring, adaptation to environmental change, and requirement for nutrients.

Question 13

A substance that an organism needs for growth and survival but cannot make for itself is referred to as a(n) ____.

Accepted Answer

A nutrient is a substance that an organism needs for growth and survival but cannot make for itself.

Question 14

The current rate of extinction in rain forests is about ____ species every minute.

Accepted Answer

The answer of The current rate of extinction in rain...

Question 15

The process by which the first cell of a new individual becomes a multicelled adult is called ____.

Accepted Answer

The process described in the question is that of development, which involves the growth and differentiation of cells into different tissues and organs to eventually form a multicelled adult organism. Homeostasis, inheritance, and reproduction are all important processes in biology but do not specifically refer to the process of the first cell becoming a multicelled adult. Growth is a component of development but does not encompass the whole process.

Question 16

On a very hot summer day and a few months later on a very cold winter day, you go outside and take your temperature. Each time your body temperature is 37 degrees Celsius. This example illustrates ____.

Accepted Answer

Homeostasis is the ability of an organism to maintain a steady internal environment despite changes in its external environment. The fact that your body temperature remains constant at 37 degrees Celsius on both a hot summer day and a cold winter day shows that your body is maintaining homeostasis in response to external temperature changes.

Question 17

The level of organization that encompasses all regions of Earth's crust, waters, and atmosphere in which organisms live is known as ____.

Accepted Answer

The biosphere is the level of organization that encompasses all regions of Earth's crust, waters, and atmosphere in which organisms live.

Question 18

Which of the following organization levels is the least inclusive?

Accepted Answer

Atoms are the smallest unit of matter and are not inclusive of any living or non-living entities.

Question 19

Which of the following represents the most correct order of the organization of life from the smallest unit to the largest?

Accepted Answer

Atoms are the smallest unit of matter, followed by molecules, cells, organisms, populations, communities, ecosystems, and finally the biosphere, which is the largest and most complex level of organization.

Question 20

All organisms fit into one of two categories: ____ and  ____.

Accepted Answer

All organisms can be classified as either producers or consumers. Producers are usually plants, algae, or bacteria that create their own food through photosynthesis or chemosynthesis, while consumers are other organisms that obtain their energy by consuming other organisms or organic matter. Decomposers, scavengers, and detritivores are all types of consumers.

Quiz 1: Invitation to Biology