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    guard cells

    paired cells on either side of a stoma that control stomatal opening and thereby regulate the movement of gases and water vapor

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Questions & Answers

what is a base?
Alice Reply
base can be define as the anatomy of structure
Ogundipe
what are somatic cells
KAKU Reply
Somatic cells responsible for making the body
Ahsan
vegetative cells, they divide by mitosis.
Ishitha
what is angiosperms
Papillon Reply
what is the function of bile
Papillon
what is neurologist
Benjamin Reply
what is a cell
God Reply
is a basic unit of living organism
Mwansa
or a basic building blocks of all living things
Mwansa
explain cell biology
Grace Reply
cell biology is a biology branch which study about function,size,definition ,....of cells.
fitsum
what are endotherms
angelina Reply
pls can someone elaborate more on biomagnification
angelina
Hey,what?
Peter
Biomagnification, also known as bioamplification or biological magnification, is any concentration of a toxin, such as pesticides, in the tissues of tolerant organisms at successively higher levels in a food chain.
chance
An endotherm (from Greek ἔνδον endon "within" and θέρμη thermē "heat") is an organism that maintains its body at a metabolically favorable temperature, largely by the use of heat set free by its internal bodily functions instead of relying almost purely on ambient heat.
chance
these are substances that absorbs heat energy
Alice
What diffusion
Oseres Reply
it is the movement of water molecules from the region of higher concentretion to a region of lower concentration
Lukas
is the movement of anything from region of higher concentration to a region of lower concentration.
chance
is a movemnt of H2O molecule from a region of higher concentration to the legion of lower Concentration.
Benjamin
diffusion is the movement of particles from a region of higher concentration to a region of lower concentration resulting into an even distribution
Alice
pls I don't know how to read very well so how can I understand all this
Mercy Reply
What's succession
Talabi Reply
an acid is a substance that produces hydrogen ions in an aqueous solution
angelina Reply
how? give a reason to support ur answer
SSEJJO
Types of acids and there definitions
SSEJJO
what is acid
asaa Reply
An acid is a substance which gives Hydrogen ions in aqueous solutions.
Ahsan
food poison
asaa
an acid is a chemical substance that produces or gives out hydrogen ions as the only positively charged ion when dissolved in water
Alice
what is salt?
Basit
a sait is a substance formed when hydrogen ions in an acid are partially or fully replaced by a metal or ammonium ions
Alice
When an acid and base react chemically, a salt is form.
Ahsan
what is nervous system
kumkum
the difference between prokaryotic cells and Eukaryotic cells
Itz Reply
karyon is nucles eukaryotes have intact membrane around its nucleus, whereas prokaryotes don't have nuclear membrane and other membrane bounded organelles
Ishitha
what is the function of chyme
Divine Reply
what makes a tissue
Divine
cells
Yazi
tell me
Betty
chyme where digested food passes from e stomach through e pyloric sphincter in 2 e duodenum.
Mary
what is an osmosis
SSEJJO Reply
tell me the answer
Betty
Osmosis is the movement of the water molecules through a semipermiable membrane from lower to higher concentrated solution.
Ahsan
is the movement of water molecules from the area of high concentration to the area of low concentration through a semi permeable membrane.
SSEJJO
what is hypertonic solution
SSEJJO
A solution having more solute concentration as compared to a cell which is in place, results shrinkage of cell.
Ahsan
what is water potential
SSEJJO
uses of Osmosis
SSEJJO
osmosis is the movement of water molecules from a region of low concentration to a region of high concentration tthrough a selective permaeble membrane
Alice

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Source:  OpenStax, Biology. OpenStax CNX. Feb 29, 2016 Download for free at http://cnx.org/content/col11448/1.10
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