The part of the cell that manages and controls all functions of the cell.
Nucleus
100
This is the process cells go through in order to reproduce.
Mitosis
100
Fill in the missing word:
organism, population, community, ________, biosphere
ecosystem
100
This describes when organisms have to share the same resources. If the population becomes too large, this will increase and limit further growth.
Competition
100
Describe what biodiversity means.
the variety of species in a specific area
200
These are specialized structures within a cell that perform specific functions.
Organelles
200
The goal of cell division is to preserve a cell's ____.
DNA or chromasomes
200
Living and nonliving factors in an environment are called...
Biotic and abiotic
200
This describes the maximum number of one type of organism that a given ecosystem can support.
Carrying capacity
200
When all members of a species die off, we call the species...
extinct
300
One way to categorize organisms is based on how many cells they have. Organisms that are made of only one cell are unicellular, whereas this describes organisms that are made of many cells.
Multicellular
300
The four phases of mitosis are...
Prophase, metaphase, anaphase, telophase
300
This type of diagram is used to illustrate how energy flows through an ecosystem.
Food web
300
There are two types of population growth curves that can result when populations are graphed over time. They are...
S-curve and J-curve
300
When the population of a species becomes very low, it becomes an _________.
endangered species
400
This type of cell contains membrane-bound organelles. Some unicellular and all multicellular organisms are made of these.
Eukaryotic
400
Unicellular organisms use mitosis as a way to _________, whereas multicellular organisms use mitosis to grow and repair tissues.
Reproduce
400
A 3D representation of a food chain, using either energy, numbers, or biomass, is called an...
ecological pyramid
400
A limiting factor that has a greater impact when the population is larger is called...
Disease is an example.
Density-dependent
400
A species that is introduced and causes damage to the ecosystem by competing or destroying resources is called...
invasive species (or exotic)
500
This type of cell contains no membrane-bound organelles, including no nucleus. All unicellular organisms are this kind.
Prokaryotic
500
Before a cell can divide, it undergoes a period of rapid growth, DNA replication, and organelle production. This period is known as...
Interphase
500
An organism's __________ describes where it sits on a food chain.
Trophic level
500
A flood would be an example of this kind of limiting factor.
Density-independent
500
Pollution can cause damage to organisms and their environment, and have many unexpected effects. This well-known pesticide was banned after its side effects, and the fact that it could travel along food chains, were discovered.