Biology Semester Review

this is the combination of chem. reactions in which organisms build up or break down materials

this is an example of symbiosis:

this is the first step in the scientific method

these are animals that consume the carcasses of animals that have already been killed.

in an ecosystem, these are always the beginning of every food web

which of these pHs would be the most acidic?

these carbohydrates are the building blocks of the others...

these are the smallest units to be considered alive:

how can you tell that a sample you are looking at under the microscope is a prokaryote?

which of these are not true of enzymes?

this is a collection of all organisms living in an area along with the non-living environment.

which of the following is NOT found in the nucleus of the cell?

who used a compound microscope to look at a sample of cork, discovering the world of "cells"?

In a good controlled experiment, how many variables should there be?

this term literally means "living planet"

Which of these qualities would not make for a good scientist?

This is the study of life

these are specialized proteins that decrease the activation energy required in reactions

which technique would best be used to study long term effect of global events?

this type of bond forms from the sharing of electrons

these are the building blocks of proteins

this group of organic molecules are used as main cellular energy sources:

a cells membrane is made of how many layers?

in a controlled experiment, the variable that is deliberately changed is the ______ variable

this group of organic molecules are used to build or send chemical messages:

climate zones are a result of which of the following:

this is a well tested explanation that unifies a broad range of hypotheses:

These are the positively charged subatomic particles

this is the attraction between molecules of different substances:

this group of organics are the most complex

How many amino acids are there?

If the Earth was NOT tilted, these would disappear:

in general, how much energy passes from one trophic level to the next?

this is the ability of an organism to survive and reproduce under a range of conditions

this group of organic molecules are used to as energy storage and as insulation:

atoms of the same element that differ in the # of neutrons are called:

this group of organic molecules are used to store our genetic information:

this is the attraction between molecules of the same substance:

this refers to any necessity of life

this is material composed of two or more elements or compounds physically mixed together.