Scientific thinking can be used

A scientist noticed that the number of salamanders in ponds in the Rocky Mountains was declining. This was a(n)

A hypothesis is a

Scientific hypotheses are most often tested by the process of

A planned procedure to test a hypothesis is called a(n)

The variable that is measured in an experiment is the _____ variable.

A specialized tool used to magnify organisms so that they can be observed is a

You can work safely in the science lab by

All of the following are important for working safely in a science laboratory except

Biology is the study of

Which of the following is not one of the seven properties of life?

All living things maintain a balance within their cells and with the environment through the process of

The energy that drives metabolism in animals comes from

A field of sunflowers facing the sun is an example of

The changes in human babies during their first year of life is an example of

The electrons of an atom

The smallest particle of matter that can retain the chemical properties of carbon is a carbon

All matter is composed of

Which of the following is not a large biomolecule?

The building blocks of most biomolecules contain the element

Which of the following molecules are classified as carbohydrates?

Which of the following is a carbohydrate?

Lipids are

Long chains of amino acids are found in

All of the following are examples of lipids except

The two types of nucleic acids are

DNA stores

ATP (adenosine triphosphate) stores energy in the bonds between its

The law of conservation of energy states that energy cannot be

An enzyme

Which of the following led to the discovery of cells?

Which of the following is part of the cell theory?

One difference between prokaryotes and eukaryotes is that prokaryotes do not have

Which cells have a cell membrane, cytoplasm, ribosomes, and DNA?

A structure within a eukaryotic cell that carries out specific activities inside the cell is called a(n)

Only eukaryotic cells have

The organelle that makes proteins in the cell is the

The organelle that modifies, sorts, and packages proteins is the

A cell that requires a lot of energy might contain large numbers of

The organelles associated with plant photosynthesis are the

What level of organization is the small intestine?

Which type of molecule forms the cell membrane?

Diffusion is the movement of a substance

The diffusion of water into or out of a cell is called

Most of the energy used by life on Earth comes from the

Light energy is converted to chemical energy through the process of

Which of the following organisms do not carry out photosynthesis?

ATP is composed of a nitrogenous base, a sugar, and

When a phosphate group is removed from an ATP molecule,

Chlorophyll is green because

The major atmospheric by-product of photosynthesis is

During the final stage of photosynthesis, sugars are produced from

The name of the process that takes place when organic compounds are broken down in the absence of oxygen is

Cells produce ATP most efficiently in the presence of

The total amount of ATP that a cell gains for each glucose molecule depends on the presence of

Which of the following processes produces the most ATP?

In order to fit within a cell, DNA becomes more compact by

The phase of the cell cycle that occupies most of an average cell’s life is

Which of the following shows the correct sequence of the cell cycle?

The synthesis (S) phase is characterized by

Mitosis is the process by which

As a result of mitosis, each of the two new cells produced from the parent cell during cytokinesis

Normal cells become cancer cells when

Precipitation and evaporation are important components of the

The water cycle continuously moves water between the atmosphere, land, and

Which of the following is common to the carbon cycle, the nitrogen cycle, and the water cycle?

Plants use carbon dioxide to build organic molecules during the process of

All living things are made of

Nitrogen is a component of

When humans and animals die, phosphorus