Why not get a good dictionary and look up the definitions of the words you do not know.
Sra
An organism's ability to maintain steady internal conditions despite changes in its external environment is called
biogenesis
homeostasis
osmosis
respiration
In an organism, a virus enters, and reproduces within, a(n)
host cell
infection
interferon
parasite
The theory that living things come only from other living things is called
biogenesis
development
ecology
spontaneous generation
A _____________ is a prediction that can be tested.
hypothesis
scientific law
theory
variable
A(n) __________ becomes part of a cell's DNA without immediately destroying the cell or replicating.
host
active virus
vaccine
latent virus
Treating genetic disorders such as sickle-cell anemia by enclosing helpful DNA in a virus and alowing the virus to enter defective cells is a type of
antibiotic
gene therapy
parasitism
vaccine
A solution containing inactive virus that is used to prevent a viral disease is a
vaccine
gene therapy
lysosome
bacteriophage
A bacterial cell DOES NOT have
a cell wall
cytoplasm
DNA
a nucleus
Proteins are made in cell structures called
chloroplasts
lysosomes
Golgi bodies
ribosomes
In plant cells, food, water, and waste products are stored in structures called
chloroplasts
mitochondria
lysosomes
vacuoles
_____________ is a virus-caused disease that affects the human immune system.
Botulism
AIDS
Pneumonia
Tuberculosis
Sugars, starch and cellulose are examples of organic compounds called
carbohydrates.
enzymes.
lipids.
nucleic acids.
The material that permanently stores the genetic blueprints of the cell is
RNA
lysosome
chromosome
cytoplasm
Green plants are producers that use light energy to make
chlorophyll
glucose
proteins
starch
Organic compounds in the chromosomes are _______________________.
carbohydrates
lipids
nucleic acids
water molecules
Most of the life of any cell is spent in a period of cell growth and development called ________________.
interphase
metaphase
prophase
telophase
Each human skin cell has __________ chromosomes.
13
18
46
52
Proteins are made of units of ____________ linked together in a specific order.
amino acids
centrioles
centromeres
cytoplasm
In sexual reproduction, a new organism is produced when _____________.
cells divide by mitosis
sex cells from two parents combine
an organism divides into two equal parts
a new organism grows from the body of its parent
During meiosis the cell nucleus divides _____ times.
one
two
three
four
The nucleus of an atom contains ____________________.
protons and neutrons
protons and electrons
protons, neutrons, and electrons
chromosomes
The theory of biogenesis states that ____________________.
living things come only from nonliving things
living things can be made artificially from chemicals in the laboratory
living things come only from other living things
all living things came from viruses
Human sex cells have 46 individual chromosomes.
True
False
Animal cells have rigid cell walls.
True
False
Structures that store food, water, and waste products in plant cells are called mitochondria.
True
False
1 answer