Flashcards in Cells Deck (43):
An instrument for viewing small objects
The smallest unit of life. Cells are the building blocks of living things
Instrument for viewing very small objects. A light microscope can magnify things up to 1500 times.
Instrument for viewing very small objects. An electron microscope is much more powerful than a light microscope and it can magnify up to a million times.
Describes a microscope through which the specimen is seen using one eye only
A microscope with two eyepieces, so you use both eyes to look at the object
Describes a microscope through which the specimen is viewed using both eyes
The number of times the image of an object has been enlarged using a lens or lens system
Structure that encloses the contents of a cell and allows the movement of some materials in and out
Small structures within a cell in which proteins such as enzymes are made
The fluid found inside cells
A material inside a cell, It contains many organelles such as the nucleus and vacuoles.
They are the ‘factories’ in which carbon dioxide and water are changed by sunlight and water into food by the process of photosynthesis.
They supply energy to other parts of the cell
Roundish structure inside a cell that acts as the control center for the cell.
Tiny, thread-like structure inside the nucleus of a cell.
The chemical substance found in all living things that encodes the genetic information of an organism
Cell division process that results in new cells with the same number of chromosomes as the original cell
The process where the cytoplasm of a cell divides to form two daughter cells
Disease that can be transferred from one organism to another
Disease that cannot be transferred from one organism to another
Substance derived from a micro-organism and used to kill bacteria in the body
Chemical used to kill bacteria on surfaces and non-living objects
Mild disinfectant used on body tissue to kill microbes
Describes an antiseptic that kills bacteria
Describes an antiseptic that stops bacteria from growing or dividing but doesn't kill them
It forms a boundary between the plant and the external environment. It is covered with a waxy coating called photosynthesis
Root Hair Cells
They collect water and mineral nutrients. The cell having a large surface area to collect more water or food.
Palisade mesophyll Cells
They are tall and closely packed to absorb maximum light. Most photosynthesis take place in the palisade cell.
Type of tissue that transports sugars made in the leaves to other parts of a plant
Transport of materials, such as water and glucose, in plants
pipelines for the flow of water up plants. They are made up of the remains of dead xylem cells fitted end to end with the joining walls broken down.
A hard substance in the walls of dead xylem cells that make up the tubes carrying water up plant stems
Small openings mainly on the lower surface of leaves. These pores are opened and closed by guard cells
Movement of water through a plant as a result of loss of water from the leaves
Groups of xylem and phloem vessels within plant stems
Loss of water from plant leaves through their stomata
Cells on either side of a stoma that work together to control the opening and closing of the stoma
Plant stems and leaves wilt when there is insufficient water in their cells.
Sacs within a cell used to store food and wastes. Plant cells usually have one large vacuole
Describes cells that are not firm due to loss of water