Week 1 Biology

What is life composed of?

Life is composed of cells.

What do organisms do to regulate their internal environment?

Organisms regulate their internal environment, take in and use energy, and respond to their environment.

What is taxonomy?

Taxonomy is the branch of biology that names and classifies species.

What are the three domains of life?

The three domains of life are Bacteria, Archaea, and Eukarya.

What defines a population?

A population is all the individuals of a particular species living in a community.

What is an emergent property?

An emergent property is a property that was not present at the preceding level of organization.

What is a theory in scientific terms?

A theory is broader in scope and is supported by a large and usually growing body of evidence.

What is an independent variable?

An independent variable is a factor that is manipulated in an experiment.

What is the purpose of controlled experiments?

In controlled experiments, an experimental group is compared with a control group.

What are some indicators of natural selection?

Indicators of natural selection include individual variation and overproduction of offspring.

What is the relationship between structure and function in biological systems?

In biological systems, structure and function are almost always related, providing insight into each other.

What is matter?

Matter is anything that occupies space and has mass.

What is a compound?

A compound is a substance consisting of two or more different elements combined in a fixed ratio.

What does iodine deficiency cause?

Iodine deficiency can cause the thyroid gland to grow to abnormal size, leading to a condition called goiter.

What determines the chemical properties of an atom?

Valence electrons determine the chemical properties of an atom.

What is a hydrogen bond?

A hydrogen bond is a weak bond formed between molecules.

What is evaporative cooling?

Evaporative cooling occurs when a substance evaporates and the surface left behind cools down.

What is the pH of humans?

The pH of humans is 7.4, which is sustained by buffers.

What are macromolecules?

Macromolecules are large molecules that include carbohydrates, proteins, and nucleic acids.

What are the four levels of protein structure?

The four levels of protein structure are primary, secondary, tertiary, and quaternary.

What is the structure of DNA?

DNA has a double helix structure with a sugar-phosphate backbone.

What is retrovirus?

Retrovirus is a virus that uses reverse transcriptase to convert RNA into DNA.