Which class of vertebrates includes animals with scales, a bony skeleton, and a two-chambered heart?
Mammals
Amphibians
Reptiles
Birds
Correct Answer :
C. Reptiles
Related Questions
Which part of a plant is responsible for producing seeds?
Stem
Leaf
Flower
Root
What is the term for the process by which animals change their physical and behavioral traits in response to seasonal changes?
Hibernation
Migration
Estivation
Camouflage
Which part of the human brain is responsible for coordinating muscle movements and maintaining balance?
Cerebrum
Cerebellum
Medulla oblongata
Hypothalamus
Which of the following is the smallest unit of the nervous system?
Neuron
Nerve
Ganglion
Brain
What is the term for a change in the sequence of DNA that can be passed on to offspring?
Gene flow
Genetic drift
Mutation
Natural selection
What type of plant tissue is responsible for transporting water and nutrients throughout the plant?
Epidermis
Xylem
Phloem
Cortex
The relationship between a bee and a flower, where the bee obtains nectar and pollen while aiding in pollination, is an example of:
Mutualism
Parasitism
Competition
Commensalism
Which level of ecological organization includes all the biotic and abiotic factors in a given area?
Population
Community
Ecosystem
Biosphere
The smallest unit of a chemical element that retains the properties of that element is called:
Atom
Molecule
Cell
Tissue
What is the term for the total number of individuals of a species in a given area?
Population density
Carrying capacity
Population dispersion
Population growth rate
What is the function of the human liver?
Filtration of blood
Regulation of blood sugar levels
Production of bile and detoxification
Transport of oxygen
Which of the following is NOT a method of preventing the spread of infectious diseases?
Vaccination
Antibiotic use
Handwashing
Quarantine
What is the primary source of energy for most ecosystems?
Wind
Water
Sunlight
Geothermal heat
Which biome is characterized by cold temperatures, permafrost, and a lack of trees?
Tundra
Desert
Tropical rainforest
Grassland
In a DNA molecule, adenine (A) pairs with:
Thymine (T)
Cytosine (C)
Guanine (G)
Uracil (U)
Which of the following is NOT a method of seed dispersal in plants?
Wind
Water
Insects
Gravity
Which process involves the copying of DNA into a complementary RNA molecule?
Transcription
Translation
Replication
Mutation
Which of the following is a characteristic of mammals?
Cold-blooded
Lay eggs
Have mammary glands
Breathe through gills
A human male has how many sex chromosomes?
1
2
23
46
What is the name of the enzyme that unwinds and separates the DNA strands during replication?
RNA polymerase
Ligase
Helicase
Polymerase chain reaction (PCR)
Which cell organelle contains digestive enzymes and is involved in cellular waste disposal?
Mitochondria
Nucleus
Lysosome
Chloroplast
In which type of plant tissue does most of the photosynthesis occur?
Xylem
Phloem
Epidermis
Mesophyll
What is the term for a disease-causing microorganism?
Antibiotic
Parasite
Pathogen
Virus
What is the primary pigment responsible for photosynthesis in plants?
Chlorophyll
Carotene
Xanthophyll
Phycobilin
What is the primary function of the mitochondria?
Protein synthesis
Energy production
Lipid synthesis
Waste elimination
What is the function of the human respiratory system?
Regulation of blood sugar levels
Transportation of oxygen and carbon dioxide
Digestion of food
Filtration of blood
Which of the following is NOT a method of bacterial reproduction?
Binary fission
Budding
Conjugation
Meiosis
Which plant hormone is responsible for promoting cell elongation and growth in response to light?
Auxin
Gibberellin
Ethylene
Cytokinin
Which of the following is a viral disease transmitted through the bite of infected mosquitoes?
Tuberculosis
Malaria
Influenza
Lyme disease
Which of the following is a direct benefit of biodiversity to humans?
Increased greenhouse gas emissions
Decreased agricultural productivity
Development of new medicines
Soil erosion