What is the primary pigment responsible for photosynthesis in plants?
Chlorophyll
Carotene
Xanthophyll
Phycobilin
Correct Answer :
A. Chlorophyll
Related Questions
What is the name of the enzyme that unwinds and separates the DNA strands during replication?
RNA polymerase
Ligase
Helicase
Polymerase chain reaction (PCR)
What is the primary function of the plant cuticle?
Gas exchange
Water retention and protection
Photosynthesis
Nutrient absorption
What is the term for an infectious protein that can cause disease in animals?
Bacteriophage
Virus
Prion
Viroid
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 part of the human brain is responsible for coordinating muscle movements and maintaining balance?
Cerebrum
Cerebellum
Medulla oblongata
Hypothalamus
Which of the following is a bacterial disease that primarily affects the respiratory system and can be prevented by vaccination?
Tuberculosis
Malaria
Cholera
Whooping cough (Pertussis)
What is the primary function of the root system in plants?
Photosynthesis
Anchoring the plant and absorbing water and nutrients
Producing flowers and fruits
Transporting sugars
Which of the following is NOT a function of the cell wall in plant cells?
Providing structural support
Regulating osmotic balance
Facilitating cell communication
Protecting against pathogens
What is the term for the shedding of the uterine lining in the absence of pregnancy, resulting in menstruation?
Ovulation
Fertilization
Menarche
Menstruation
What is the primary source of energy for most ecosystems?
Wind
Water
Sunlight
Geothermal heat
What is the term for the process by which an embryo implants itself in the uterine lining and begins to develop?
Ovulation
Fertilization
Implantation
Menstruation
Homo sapiens originated on which continent?
Africa
Asia
Europe
South America
What is the term for the process by which modern humans gradually replaced archaic humans, such as Neanderthals, through migration and competition?
Speciation
Coevolution
Extinction
Out-of-Africa hypothesis
Which of the following is a sex-linked genetic disorder?
Huntington's disease
Down syndrome
Hemophilia
Cystic fibrosis
What is the primary function of the fallopian tubes in the female reproductive system?
Menstruation
Fertilization of the egg by sperm
Implantation of the fertilized egg in the uterus
Production of estrogen
Which of the following is an example of an invasive species?
Native grasses in their natural habitat
A non-native tree planted in a garden
A species that naturally occurs in a specific ecosystem
A species that is endangered
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?
Hibernation
Migration
Circadian rhythm
Nocturnal behavior
What is the term for the transfer of pollen from the male reproductive organ to the female reproductive organ of a flower?
Fertilization
Pollination
Germination
Embryo development
What is the term for the innate, automatic response of an organism to a stimulus?
Conditioning
Habituation
Reflex
Instinct
Which level of ecological organization includes all the biotic and abiotic factors in a given area?
Population
Community
Ecosystem
Biosphere
What is the term for the process by which two unrelated species evolve similar traits in response to similar environmental pressures?
Natural selection
Convergent evolution
Artificial selection
Coevolution
What is the function of the pancreas in the human body?
Digestion of proteins
Regulation of blood sugar levels
Filtration of blood
Production of bile
Which hominid species is known for its use of fire and tools, and is believed to be the first to migrate out of Africa?
Neanderthals
Homo erectus
Australopithecus afarensis
Homo habilis
Which of the following is a characteristic of arachnids?
Six legs
Two pairs of antennae
Exoskeleton made of chitin
Segmented body
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
Which of Mendel's laws states that alleles for different genes segregate independently during gamete formation?
Law of Dominance
Law of Independent Assortment
Law of Segregation
Law of Inheritance
Which microorganism is responsible for the majority of human yeast infections?
Bacteria
Virus
Fungus
Protist
What is the name of the protein that carries oxygen in red blood cells?
Insulin
Hemoglobin
Collagen
Myoglobin
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
What is the role of the hypothalamus in the human brain?
Coordination of muscle movements
Regulation of body temperature and hormone secretion
Memory storage
Visual processing