Quiz 1 Intro to Biology and Ecosystems

What is the mechanism of evolution as proposed by Charles Darwin?

natural selection

Two atoms of the same element with a different number of ________, are called ___________.

neutrons; isotopes

What are the two main processes that ecosystems depend upon?

nutrient cycling and energy flow

cellulose is

structural form found in plants

A hierarchical system of grouping living things according to their degree of similarity is

taxonomy

Autotrophs are essential components of an ecosystem because they

are the primary producers

The lower the pH of a solution, the

The lower the pH of a solution, the

An element has an atomic number of 32 and a mass number of 65. How many neutrons does it have?

33

If an atom has two neutrons, two electrons, and two protons, it has a mass number of

4

The hydrogen bonds between water molecules (check all that apply)

All 1) causes it to be less dense than water when it freezes, causing ice to float on water 2) allow it to absorb and release heat more slowly than other substances 3) make it a metal 4) allow it to easily mix with fats and oils

What is the fundamental difference between covalent and ionic bonding?

In a covalent bond, atoms share at least one pair of electrons to fill electron shells; in an ionic bond, one atom atoms accepts electrons from the other to fill electron shells.

Glucose and Fructose are

Monosaccharides

Check all that are found in the nucleus of an atom.

Neutron, electron, proton

All atoms of an element have the same number of _______.

Protons

An atom that is neutrally charged has the same number of ______ and ______

Protons and Electrons

A secondary consumer eats primary consumers true or false?

True

How does taxonomy assist biologists?

by categorizing diverse items into smaller and smaller numbers of groups

What are the basic units of life?

cells

We join the fatty acid chain to the glycerol molecule when building a triglyceride by pulling out ______. This is called the ______

condensation reaction, dehydration synthesis

A glycerol with three fatty acids attached is referred to as a _______.

fat

starch is

food storage form found in plants

Which of the following subatomic particles are NOT found in the nucleus of an atom?

only electrons

The type of bond formed between amino acids is called a:

peptide bond

A community is composed of

potentially interacting populations of different species of organisms

The linear sequence of amino acids in a polypeptide chain is referred to as a protein's ____________ structure.

primary

Enzymes are:

proteins

glycogen is

storage form found in animals

What sugar group is found in molecules of RNA and ATP?

ribose

Carl Linneus grouped organisms by

similarilty of physical characteristics

When a protein has achieved the ____________ level of protein structure, it takes on a 3-D shape due to the R-group interactions.

tertiary

The main abiotic reservoir for carbon is _____.

the atmosphere

In order to join to simple sugars together , ______ is removed and this process is called the ______

water, dehydration synthesis