Semester 1 review, chem, biochemistry, ecology

Question 1

Atoms that have gained or lost electrons are called:

Accepted Answer

ions

Question 2

Choose the density-independent limiting factor.

Accepted Answer

tornado

Question 3

All living things are composed of __________ :

Accepted Answer

cells

Question 4

All energy on Earth comes from the:

Accepted Answer

sun

Question 5

The main gases responsible for the greenhouse effect:

Accepted Answer

carbon dioxide and water vapor

Question 6

The gradual regrowth of an area that occurs to form a new community or repair damage from a disturbance:

Accepted Answer

succession

Question 7

Experiments need a _______ _______ as a basis of comparison at the end of the experiment.

Accepted Answer

control group

Question 8

The measure of an acid or base is determined using what scale and range?

Accepted Answer

pH, 0-14

Question 9

Ice floats because:

Accepted Answer

solid water is less dense

Question 10

The role a species plays in its environment, like a predator limiting prey populations:

Accepted Answer

niche

Question 11

A sodium atom has 1 electron in its outer energy level. What does it do to form a bond?

Accepted Answer

get rid of 1 electron

Question 12

Water is a __________ molecule, having uneven charges, which is why it has many of its unique properties.

Accepted Answer

polar

Question 13

A distinct area of land, characterized by temperature, precipitation and plant life:

Accepted Answer

biome

Question 14

Proteins are created in this organelle:

Accepted Answer

ribosomes

Question 15

Experiments are run by testing individuals or groups called:

Accepted Answer

experimental groups

Question 16

This ecological model shows unlimited, fast population growth:

Accepted Answer

exponential model

Question 17

Atoms want to be stable by having full energy levels. They do this by forming:

Accepted Answer

bonds

Question 18

The biome with the most life, a canopy of trees, warm temperatures and lots of rain:

Accepted Answer

tropical rainforest

Question 19

This biome is far north, cold, with coniferous trees and low precipitation:

Accepted Answer

taiga

Question 20

Once laws and theories have been proven, they can never be changed.

Accepted Answer

false

Question 21

Choose which answer is NOT a property of water:

Accepted Answer

nonpolar

Question 22

All of the life on the surface of the planet; the land, water and atmosphere:

Accepted Answer

biosphere

Question 23

A way organisms avoid predation by blending in with the environment:

Accepted Answer

camouflage

Question 24

When niches overlap too much within a community, a possible result is:

Accepted Answer

competition

Question 25

CFC's cause damage to the ozone layer, which causes:

Accepted Answer

more UV light to penetrate

Question 26

Do plant cells have mitochondria?

Accepted Answer

yes

Question 27

All organisms work to maintain stable internal conditions, which is called:

Accepted Answer

homeostasis

Question 28

Do animal cells have a cell wall?

Accepted Answer

no

Question 29

In chemical reactions, reactants are on the left side and _________ are on the right side.

Accepted Answer

products

Question 30

All living things contain:

Accepted Answer

genetic material

Question 31

Organisms that are made of only one cell are:

Accepted Answer

unicellular

Question 32

Biology is the study of:

Accepted Answer

life

Question 33

We know energy changes form and is lost as ________, which is why only 10% is transferred through food webs.

Accepted Answer

heat

Question 34

The organelle cells use for energy, making ATP:

Accepted Answer

mitochondria

Question 35

A substance has a pH of 5. It is a/an:

Accepted Answer

acid

Question 36

Positive particles in the nucleus of an atom:

Accepted Answer

protons

Question 37

Bonds between atoms where electrons are shared:

Accepted Answer

covalent

Question 38

The smallest building blocks of matter, all represented on the periodic table:

Accepted Answer

atoms

Question 39

Do eukaryotic cells have organelles?

Accepted Answer

yes

Question 40

Which type of cell lacks a nucleus and other organelles?

Accepted Answer

prokaytoic

Question 41

Which answer below is NOT part of the cell theory?

Accepted Answer

Cells are all complex, containing organelles

Question 42

All living things maintain stable internal conditions, called:

Accepted Answer

homeostasis

Question 43

Do prokaryotic cells have ribosomes?

Accepted Answer

yes

Question 44

When plotting information on a graph, the independent variable goes on the:

Accepted Answer

x-axis

Question 45

All living things have the ability to change over time, as a species, called:

Accepted Answer

evolution

Question 46

Substances humans have been digging/drilling up and burning, causing global climate change:

Accepted Answer

fossil fuels

Question 47

The types of bonds that form between atoms when they transfer electrons, becoming charged:

Accepted Answer

ionic

Question 48

The logistic model of population growth reaches carrying capacity because of:

Accepted Answer

limiting factors

Question 49

The removal of massive amounts of trees, causing habitat loss is:

Accepted Answer

deforestation

Question 50

An organelle that is unique to animal cells:

Accepted Answer

centrioles

Question 51

The loss of water from plants, releasing it into the atmosphere:

Accepted Answer

transpiration

Question 52

Organisms that are essential to ecosystems, returning nutrients to the soil and air that would be "lost" in waste:

Accepted Answer

decomposers

Question 53

Organisms that only consume producers:

Accepted Answer

herbivores

Question 54

Negative, high-energy particles, found in energy levels around the nucleus:

Accepted Answer

electrons

Question 55

Bacteria are an example of this category of cell:

Accepted Answer

prokaryotic

Question 56

Energy flows through ecosystems, so we always need a steady supply from:

Accepted Answer

the sun

Question 57

While running her experiment on gibbons, she counted how many times they jumped. This data was:

Accepted Answer

quantitative

Question 58

This species is critical to the survival of many species in an ecosystem as an essential predator/prey item.

Accepted Answer

keystone species

Question 59

An idea that has been tested and proven many times that explains how something happens:

Accepted Answer

theory

Question 60

Using the scientific method, scientists develop a/an __________, or testable statement.

Accepted Answer

hypothesis

Question 61

The surrounding barrier of all cells that regulates materials and maintains homeostasis.

Accepted Answer

cell membrane

Question 62

The control center of cells, containing DNA:

Accepted Answer

nucleus

Question 63

What type of relationship benefits both species involved and is the most common form of symbiosis?

Accepted Answer

mutualism

Question 64

All living things have the ability to _______________, creating new organisms of a species.

Accepted Answer

reproduce

Semester 1 review, chem, biochemistry, ecology

Questions 82

Semester 1 review, chem, biochemistry, ecology

Questions 82