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4

In which plant tissue does most photosynthesis occur?

A. Epidermis

B. Xylem

C. Phloem

D. Mesophyll

Correct Answer :

D. Mesophyll


Related Questions

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4

What is the term for a gene that is expressed when present, even if only one copy is present in an individual's genotype?

A. Recessive

B. Dominant

C. Co-dominant

D. Allelic

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4

In humans, which hormone is responsible for the development of secondary sexual characteristics in males?

A. Estrogen

B. Progesterone

C. Testosterone

D. Prolactin

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4

What is the term for a virus that infects bacteria?

A. Bacteriophage

B. Retrovirus

C. Prion

D. Viroid

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4

What is the primary function of the plant cuticle?

A. Gas exchange

B. Water retention and protection

C. Photosynthesis

D. Nutrient absorption

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4

The smallest unit of a chemical element that retains the properties of that element is called:

A. Atom

B. Molecule

C. Cell

D. Tissue

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4

Which of the following is a sex-linked genetic disorder?

A. Huntington's disease

B. Down syndrome

C. Hemophilia

D. Cystic fibrosis

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4

Which plant hormone is responsible for promoting cell elongation and growth in response to light?

A. Auxin

B. Gibberellin

C. Ethylene

D. Cytokinin

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4

What is the primary function of the mitochondria?

A. Protein synthesis

B. Energy production

C. Lipid synthesis

D. Waste elimination

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4

What is the term for the process by which a pathogen is recognized and neutralized by the immune system upon subsequent exposure?

A. Vaccination

B. Antibody production

C. Immunity

D. Immune response

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4

Which blood vessels carry oxygenated blood away from the heart to the body's tissues?

A. Veins

B. Arteries

C. Capillaries

D. Venules

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4

What is the term for the shedding of the uterine lining in the absence of pregnancy, resulting in menstruation?

A. Ovulation

B. Fertilization

C. Menarche

D. Menstruation

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4

In a DNA molecule, adenine (A) pairs with:

A. Thymine (T)

B. Cytosine (C)

C. Guanine (G)

D. Uracil (U)

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4

Which part of the human brain is responsible for regulating basic bodily functions like breathing and heart rate?

A. Cerebrum

B. Cerebellum

C. Medulla oblongata

D. Thalamus

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4

Which process involves the copying of DNA into a complementary RNA molecule?

A. Transcription

B. Translation

C. Replication

D. Mutation

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4

What is the term for a change in the sequence of DNA that can be passed on to offspring?

A. Gene flow

B. Genetic drift

C. Mutation

D. Natural selection

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4

What is the term for the process by which an embryo implants itself in the uterine lining and begins to develop?

A. Ovulation

B. Fertilization

C. Implantation

D. Menstruation

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4

What is the term for the maximum number of individuals of a species that an ecosystem can support indefinitely?

A. Carrying capacity

B. Population density

C. Limiting factor

D. Exponential growth

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4

What is the term for the process by which two unrelated species evolve similar traits in response to similar environmental pressures?

A. Natural selection

B. Convergent evolution

C. Artificial selection

D. Coevolution

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4

Which organelle is responsible for protein synthesis?

A. Golgi apparatus

B. Ribosome

C. Endoplasmic reticulum

D. Lysosome

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4

Which part of a plant is responsible for producing seeds?

A. Stem

B. Leaf

C. Flower

D. Root

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4

In which plant tissue does most photosynthesis occur?

A. Epidermis

B. Xylem

C. Phloem

D. Mesophyll

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4

What is the function of the cell membrane?

A. Synthesizing proteins

B. Protecting the nucleus

C. Regulating the passage of substances in and out of the cell

D. Storing genetic information

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4

Which of the following is a direct benefit of biodiversity to humans?

A. Increased greenhouse gas emissions

B. Decreased agricultural productivity

C. Development of new medicines

D. Soil erosion

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4

The study of the geographic distribution of species is known as:

A. Biogeography

B. Ecology

C. Ethology

D. Taxonomy

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4

Which cell organelle contains digestive enzymes and is involved in cellular waste disposal?

A. Mitochondria

B. Nucleus

C. Lysosome

D. Chloroplast

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4

Which scientist is credited with developing the theory of natural selection?

A. Charles Darwin

B. Gregor Mendel

C. Louis Pasteur

D. Alfred Wegener

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4

In angiosperms, what is the female reproductive structure that contains the ovules?

A. Stamen

B. Pistil (carpel)

C. Sepal

D. Petal

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4

Which of the following is NOT a method of seed dispersal in plants?

A. Wind

B. Water

C. Insects

D. Gravity

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4

In which type of population distribution are individuals evenly spaced throughout their habitat?

A. Random dispersion

B. Clumped dispersion

C. Uniform dispersion

D. Overlapping dispersion

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4

Which of the following is the smallest unit of the nervous system?

A. Neuron

B. Nerve

C. Ganglion

D. Brain