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4

What is the term for an infectious protein that can cause disease in animals?

A. Bacteriophage

B. Virus

C. Prion

D. Viroid

Correct Answer :

C. Prion


Related Questions

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Which microorganism is responsible for the majority of human yeast infections?

A. Bacteria

B. Virus

C. Fungus

D. Protist

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What is the term for the process by which modern humans gradually replaced archaic humans, such as Neanderthals, through migration and competition?

A. Speciation

B. Coevolution

C. Extinction

D. Out-of-Africa hypothesis

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4

What is the primary source of energy for most ecosystems?

A. Wind

B. Water

C. Sunlight

D. Geothermal heat

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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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Which of the following is a characteristic of arachnids?

A. Six legs

B. Two pairs of antennae

C. Exoskeleton made of chitin

D. Segmented body

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4

What is the function of the human respiratory system?

A. Regulation of blood sugar levels

B. Transportation of oxygen and carbon dioxide

C. Digestion of food

D. Filtration of blood

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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

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

In which type of plant tissue does most of the photosynthesis occur?

A. Xylem

B. Phloem

C. Epidermis

D. Mesophyll

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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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What is the term for a disease-causing microorganism?

A. Antibiotic

B. Parasite

C. Pathogen

D. Virus

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4

A human male has how many sex chromosomes?

A. 1

B. 2

C. 23

D. 46

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4

Which biome is characterized by cold temperatures, permafrost, and a lack of trees?

A. Tundra

B. Desert

C. Tropical rainforest

D. Grassland

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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

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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What term describes the process by which animals adjust their internal biological clocks to match the daily cycle of light and dark in their environment?

A. Hibernation

B. Migration

C. Circadian rhythm

D. Nocturnal behavior

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4

What is the name of the enzyme that unwinds and separates the DNA strands during replication?

A. RNA polymerase

B. Ligase

C. Helicase

D. Polymerase chain reaction (PCR)

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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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Which species is believed to be the closest ancestor to modern humans?

A. Neanderthals

B. Homo erectus

C. Australopithecus afarensis

D. Homo habilis

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4

What is the process by which plants respond to light and grow toward it called?

A. Phototropism

B. Gravitropism

C. Thigmotropism

D. Hydrotropism

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What is the term for the process by which animals change their physical and behavioral traits in response to seasonal changes?

A. Hibernation

B. Migration

C. Estivation

D. Camouflage

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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 hominid species is known for its use of fire and tools, and is believed to be the first to migrate out of Africa?

A. Neanderthals

B. Homo erectus

C. Australopithecus afarensis

D. Homo habilis

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4

What is the name of the enzyme in saliva that begins the digestion of starches?

A. Pepsin

B. Amylase

C. Trypsin

D. Lipase

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4

Which type of learning occurs when an animal associates a neutral stimulus with a meaningful stimulus to produce a response?

A. Classical conditioning

B. Operant conditioning

C. Habituation

D. Imprinting

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4

What is the role of the hypothalamus in the human brain?

A. Coordination of muscle movements

B. Regulation of body temperature and hormone secretion

C. Memory storage

D. Visual processing

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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

What is the process by which segments of DNA are shuffled during the formation of gametes, leading to genetic diversity?

A. Meiosis

B. Mitosis

C. Replication

D. Crossing over

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What is the term for the process by which plants lose water vapor through small openings in their leaves?

A. Transpiration

B. Photosynthesis

C. Respiration

D. Osmosis