with Verified Answers.
what deficiency causes night blindness - Answer: Vitamin A
A drop of dilute ammonium hydroxide (NH4OH) is placed on one side of a slide containing a
large number of swimming paramecium. Under this condition, which of these behaviors of the
paramecia will be observed? - Answer: They eventually will all swim away from the ammonium
hydroxide
The process of nuclear cell division in the cell reproduction of plants differs from mammals. A
major difference is that - Answer: cell plates are synthesized
Semipermeable membrane - Answer: refers to the selective nature of the plasma membrane. It
contains pores and channels that allow only particles of the right size or the right chemical
nature to pass through.
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,Interstitial fluide - Answer: contains substances such as amino acids, sugars, fatty acids,
hormones, neurotransmitters, and salts.
Cytoplasm - Answer: is the fluid matrix found between the plasma membrane and the nucleus
that acts as scaffolding for the organelles.
Organelles - Answer: (little organs) are specialized units in the cell that per form certain
functions.
Mitochondria - Answer: are the locations for cellular respiration, that is, the conversion of food
to energy at the cellular level. The site of energy production and of most of its ATP.
ATP (adenosine triphosphate) - Answer: the chemical the cell uses to store and transfer energy
within itself.
Ribosomes - Answer: are the sites of protein synthesis in the cell
Endoplasmic reticulum (ER) - Answer: Ribosomes are attached. Serves as a means for transport
within the cell and is made up of many channels. Rough endoplasmic reticulum named for the
fact that it has ribosomes on its surface, serves to store and deliver the proteins made by the
attached ribosomes. Smooth ER is free of ribosomes it performs varying functions in different
cells, including the storage of enzymes and minerals and the folding of proteins, among other
things. It is thought to be involved in the detoxification of chemicals and the metabolism of fats.
Golgi complex - Answer: modifies and packages proteins destined for use in the cell or for
export from the cell.
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,Lysosomes - Answer: are sacs that contain strong digestive enzymes. These sacs are responsible
for digesting cell structures that are no longer living or that are malfunctioning, and for
digesting waste.
Cell wall - Answer: Only plant cells have them. It is responsible for the protection of the cell, the
maintenance of the shape, and water balance.
Chloroplasts - Answer: contain chlorophyll, which is necessary for photosynthesis.
Vacuoles - Answer: plant cells also often large ones. Which are compartments in the cytoplasm
that act as places for secretion, excretion, and storage.
Chromatin - Answer: DNA is in this loosely structured form when it is not dividing
Chromosomes - Answer: DNA is seen in condensed rod-shaped bodies when the cell is dividing
Mitosis - Answer: When cells divide, the appropriate amount of genetic material must be
passed on to the new, or so-called daughter, cells. In somatic (non reproductive) cells, the new
cells are identical copies of the parent cells. This is achieved by a doubling of the chromosomes
prior to division. It is useful in the growth and repair of our bodies.
Zygote - Answer: the cell created by the union of a sperm and egg contains a full set of
chromosomes, half from each parent.
Meiosis - Answer: Another type of division takes place in the production of gametes. It contains
half of the normal number of chromosomes. It consists first of doubling of chromosomes and
then two subsequent divisions. Thus the products are four daughter cells, each with half the
normal number of chromosomes.
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, Muscle tissue - Answer: skeletal, cardiac, and smooth
Epithelial tissue - Answer: skin, the lining of organs
Which organism uses nitrogen directly from the air? - Answer: blue green algae
You cut your finger rather deeply while slicing an apple. Which of these actions should you take
first? - Answer: wash the wound continuously with cold running water
Which of these units is associated with magnitude but not direction? - Answer:
In varieties of matter, the term heterogenous may be applied to - Answer: mixtures but not
elements or compounds
Iodized salt is used to prevent a human condition known as - Answer: goiter
The bending of a wave around an obstacle is known as - Answer: diffraction
Which of these hydrocarbons is a member of the benzene family? - Answer: Tuolene
Which of these single measurements can be used to measure the current flowing through a
circuit? - Answer: Ammeter
Which of these substances contain a non polar covalent bond - Answer: O2
Which of these temperatures is known as Absolute Zero - Answer: 0 K
Which of these processes is responsible for recorded production of CO2 by yeast cells from
sugar solution? - Answer:
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