Duplicate of Biology Semester Review

How many amino acids are there?

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

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

a cells membrane is made of how many layers?

this is the attraction between molecules of different substances:

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

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

which of these are not true of enzymes?

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

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

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

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

this term literally means "living planet"

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

these are the building blocks of proteins

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

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

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

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

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

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

this is an example of symbiosis:

which of these pHs would be the most acidic?

this type of bond forms from the sharing of electrons

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

this is the attraction between molecules of the same substance:

these are the smallest units to be considered alive:

this is the first step in the scientific method

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

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

These are the positively charged subatomic particles

This is the study of life

this refers to any necessity of life

this group of organics are the most complex

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

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

climate zones are a result of which of the following:

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

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

If the Earth was NOT tilted, these would disappear: