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

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 homeostasis.

In an organism, a virus enters, and reproduces within, a host cell.

The theory that living things come only from other living things is called biogenesis.

A hypothesis is a prediction that can be tested.

A latent virus becomes part of a cell's DNA without immediately destroying the cell or replicating.

Treating genetic disorders such as sickle-cell anemia by enclosing helpful DNA in a virus and allowing the virus to enter defective cells is a type of gene therapy.

A solution containing inactive virus that is used to prevent a viral disease is a vaccine.

A bacterial cell DOES NOT have a nucleus.

Proteins are made in cell structures called ribosomes.

In plant cells, food, water, and waste products are stored in structures called vacuoles.

AIDS is a virus-caused disease that affects the human immune system.

Sugars, starch, and cellulose are examples of organic compounds called carbohydrates.

The material that permanently stores the genetic blueprints of the cell is chromosome.

Green plants are producers that use light energy to make glucose.

Organic compounds in the chromosomes are nucleic acids.

Most of the life of any cell is spent in a period of cell growth and development called interphase.

Each human skin cell has 46 chromosomes.

Proteins are made of units of amino acids linked together in a specific order.

In sexual reproduction, a new organism is produced when sex cells from two parents combine.

During meiosis, the cell nucleus divides four times.

The nucleus of an atom contains protons and neutrons.

The theory of biogenesis states that living things come only from other living things.

False, human sex cells have 23 individual chromosomes.

False, animal cells do not have rigid cell walls.

False, structures that store food, water, and waste products in plant cells are called vacuoles.

An organism's ability to maintain steady internal conditions despite changes in its external environment is called homeostasis. Homeostasis allows organisms to regulate things like temperature, pH levels, and nutrient levels to ensure optimal functioning.

In an organism, a virus enters, and reproduces within, a host cell. The host cell provides the necessary machinery and resources for the virus to replicate and produce more viral particles. The virus essentially hijacks the host cell's machinery for its own reproductive purposes.

The theory that living things come only from other living things is called biogenesis. This theory opposes the idea of spontaneous generation, which suggests that living organisms can arise from non-living matter.

A hypothesis is a prediction that can be tested. It is a proposed explanation or answer to a scientific question or problem. Hypotheses are often formulated based on observations, prior knowledge, and logical reasoning.

A latent virus is a virus that becomes part of a cell's DNA without immediately destroying the cell or replicating. Instead, the virus remains dormant within the cell's genetic material, potentially reactivating and causing symptoms in the future.

Treating genetic disorders such as sickle-cell anemia by enclosing helpful DNA in a virus and allowing the virus to enter defective cells is a type of gene therapy. Gene therapy aims to introduce or modify genes within an individual's cells to treat or prevent genetic diseases.

A vaccine is a solution containing an inactive virus that is used to prevent a viral disease. Vaccines stimulate the immune system to recognize and respond to specific antigens associated with the virus, providing immunity against future infections.

A bacterial cell does not have a nucleus. Unlike eukaryotic cells, bacterial cells lack a defined nucleus and instead have a region called the nucleoid, where the DNA is located.

Proteins are made in cell structures called ribosomes. Ribosomes are found in both prokaryotic and eukaryotic cells and are responsible for protein synthesis, which involves assembling amino acids into polypeptide chains.

In plant cells, food, water, and waste products are stored in structures called vacuoles. Vacuoles are large, membrane-bound organelles that play various roles in plant cells, including storage, regulation of water content, and maintaining turgor pressure.

AIDS is a virus-caused disease that affects the human immune system. AIDS stands for Acquired Immunodeficiency Syndrome and is caused by the human immunodeficiency virus (HIV).

Sugars, starch, and cellulose are examples of organic compounds called carbohydrates. Carbohydrates are macromolecules composed of carbon, hydrogen, and oxygen atoms and serve as a primary source of energy for living organisms.

The material that permanently stores the genetic blueprints of the cell is the chromosome. Chromosomes are structures composed of DNA and proteins that carry genes and are responsible for transmitting genetic information from one generation to the next.

Green plants use light energy to make glucose through a process called photosynthesis. Glucose is a simple sugar and serves as a source of energy for the plant and can be stored as starch.

Organic compounds in the chromosomes are nucleic acids. Nucleic acids, including DNA and RNA, are macromolecules that store and transmit genetic information.

Most of the life of any cell is spent in a period of cell growth and development called interphase. Interphase is the longest phase of the cell cycle and includes the G1, S, and G2 phases, during which the cell grows, duplicates its DNA, and prepares for cell division.

Each human skin cell has 46 chromosomes. Humans have 23 pairs of chromosomes, making a total of 46 chromosomes in most cells of the body (except for sex cells, which have only 23 individual chromosomes).

Proteins are made of units of amino acids linked together in a specific order. Amino acids are the building blocks of proteins, and the sequence of amino acids determines the structure and function of the protein.

In sexual reproduction, a new organism is produced when sex cells from two parents combine. This process, known as fertilization, results in the fusion of male and female gametes (sperm and egg) to form a zygote which develops into a new individual.

During meiosis, the cell nucleus divides twice. Meiosis is a specialized type of cell division that occurs in reproductive cells and reduces the chromosome number by half. It involves two rounds of division, resulting in the formation of four haploid cells (gametes).

The nucleus of an atom contains protons and neutrons. Protons have a positive charge, neutrons have no charge, and together they constitute the nucleus of an atom. Electrons orbit the nucleus and have a negative charge.

The theory of biogenesis states that living things come only from other living things. This theory rejects the notion of spontaneous generation, which suggests that living things can arise from non-living matter.

False. Human sex cells, also known as gametes (sperm and egg), have 23 individual chromosomes rather than the typical 46 found in most body cells. When sperm and egg fuse during fertilization, they restore the full complement of 46 chromosomes.

False. Animal cells do not have rigid cell walls like plant cells. Instead, animal cells have flexible cell membranes that surround and protect the cell.

False. Structures that store food, water, and waste products in plant cells are called vacuoles. Mitochondria, on the other hand, are responsible for energy production through cellular respiration.