The greek word for "naked seed"
more Carbon-dioxide and more sunlight
Two advantages plants had when they adapted to life on land.
A thickened ovary that holds seeds is called a (an)
Viruses can not ___ on their own
A ____ is a weakened or non-functioning virus that is used to stimulate the immune system into making antibodies.
aid in digestion, act as decomposers, clean oil spills, treat sewage
Ways in which bacteria help humans
___ is the process by which bacteria use energy of chemicals such as hydrogen sulfide, to make food.
Bacteria can form groups called ___ where they can be seen with the naked eye.
Bacterium can form an ____ when conditions are adverse. During this time the bacteria is dormant or in a resting stage.
___ live on or in a host and cause harm.
The process of heating food to high temperatures to kill off bacteria is called _____.
prevent food spoilage
Pasteurization, refrigeration, freezing, canning, salting, smoking and cooking food are all ways to _________ by bacteria.
Animal cells are eukaryotic while bacteria cells are ______.
Prokaryotic cells have no ____.
A virus that attacks a bacterial cell.
Bacteria reproduce by ___, one cell splitting into two.
The first ___ appeared 475 million years ago.
moss and ferns
Some of the earliest plants were ___.
A single reproductive cell that is protected by a hard watertight covering.
A __ is a young plant that is enclosed in a protective coating.
When conditions are right ___will occur, which is the beginning of growth of a new plant from a spore or seed.
The small structure that holds the sperm cells for plants.
___ occurs when a pollen grain reaches the part of the plant containing the female egg and releases the sperm.
Once the eggs are fertilized and the seeds form, the ovary wall will thicken and the ovary becomes the ____.
The __ carries water and nutrients for a plant.
The ___ carries sugars the plant uses for food.
The middle of the leaf, where the "magic happens" or photosynthesis occurs.
Tiny openings that exchange gases and water vapor located on the bottom of the leaf.
The ___ packages the xylem and the phloem together, it's the "highway" of the plant.
The waxy outer covering of the leaf that helps keep water in the plant leaf.
The layer that helps protect the leaf and is where gas exchange occurs because it has the tiny openings.
An organism that can make its own food.
Organisms that break down dead organisms into simpler substances are called___.
An organism that a parasite lives in or on is called a ___.
Attachment, injection, production, assembly and release are the 5 steps of ___.