Biology, Cells, Test

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Current scientific methods can not conclusively distinguish

between all microorganisms

According to the Organismal Theory the

organism is the basic unit of life

hypertonic water flow

out of the cell

diffusion

the natural tendency of molecules to move from higher to lower concentration

the process of photosynthesis

6CO₂+C₆H₁₂O₆ ---(chlorophyll)--->C₆H₁₂O₆+6CO₂+6H₂O

some leukocytes absorb entire

bacteria by the process of phagocytosis

plasma membrane

controls what comes into and goes out of the cell

nucleolus

small structures within nucleus

cellular respiration

- CO₂ diffuses passively out of the cell - O₂ diffuses passively when converted to CO₂

why will external fluid flow into a plant cell?

- because the external water concentration is greater - because the external salt concentration is less

four organ systems which are operational in an amoeba

- respiration - digestion - reproduction - excretion

the simplest operational cell is still more complex than

a computer

organismal theory

a functioning organism represents life

the plasma membrane of a human cell

acts as a selective gatekeeper

cytoplasm

all cellular material outside the nucleus

epidermis

an outer covering of cells

organism

any functional plant or animal with interrelated parts

According to the Cell Theory, the

cell is the basic unit of life

nucleus

control center of the cell

cell theory

each cell possesses a life of its own

a leukocyte is responsible for

fighting disease by phagocytosis or antibody production

Ribosomal RNA

forms part of ribosomes, a cell's protein factories; formed in nucleolus

the taxonomic classification of all organisms

is not certain

characteristic that is unique to DNA

it contains coded information

vacuole

large storage structures

the relative concentration of water in a hypertonic solution is

low

cell wall

outer covering around plant cell made of fibrous material

organisms referred to as "colonial"

similar bacteria or protozoa which group together

Simple cell division of plants differs from

simple cell division of animals

Krebs cycle

takes place within the mitochondria; second stage of cellular respiration, in which pyruvic acid is broken down into carbon dioxide in a series of energy-extracting reactions


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