Which plant hormone is responsible for promoting cell elongation and growth in response to light?
Auxin
Gibberellin
Ethylene
Cytokinin
Correct Answer :
A. Auxin
Related Questions
What is the primary source of energy for most ecosystems?
Wind
Water
Sunlight
Geothermal heat
What is the term for a gene that is expressed when present, even if only one copy is present in an individual's genotype?
Recessive
Dominant
Co-dominant
Allelic
In which type of population distribution are individuals evenly spaced throughout their habitat?
Random dispersion
Clumped dispersion
Uniform dispersion
Overlapping dispersion
Which of the following is a characteristic of mammals?
Cold-blooded
Lay eggs
Have mammary glands
Breathe through gills
Which of the following is NOT a method of bacterial reproduction?
Binary fission
Budding
Conjugation
Meiosis
What is the name of the enzyme in saliva that begins the digestion of starches?
Pepsin
Amylase
Trypsin
Lipase
What type of plant tissue is responsible for transporting water and nutrients throughout the plant?
Epidermis
Xylem
Phloem
Cortex
In which type of plant tissue does most of the photosynthesis occur?
Xylem
Phloem
Epidermis
Mesophyll
Which blood vessels carry oxygenated blood away from the heart to the body's tissues?
Veins
Arteries
Capillaries
Venules
In a DNA molecule, adenine (A) pairs with:
Thymine (T)
Cytosine (C)
Guanine (G)
Uracil (U)
Which of the following is a characteristic of arachnids?
Six legs
Two pairs of antennae
Exoskeleton made of chitin
Segmented body
Which biome is characterized by cold temperatures, permafrost, and a lack of trees?
Tundra
Desert
Tropical rainforest
Grassland
A human male has how many sex chromosomes?
1
2
23
46
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
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 process by which species evolve into more diverse forms over time?
Speciation
Convergent evolution
Divergent evolution
Coevolution
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
Which term refers to structures that have no apparent function but resemble functional structures in other organisms?
Homologous structures
Analogous structures
Vestigial structures
Adaptive structures
The study of the geographic distribution of species is known as:
Biogeography
Ecology
Ethology
Taxonomy
Which microorganism is responsible for the majority of human yeast infections?
Bacteria
Virus
Fungus
Protist
What is the term for the study of human societies, cultures, and behaviors?
Sociology
Anthropology
Psychology
Archaeology
Which part of the human brain is responsible for regulating basic bodily functions like breathing and heart rate?
Cerebrum
Cerebellum
Medulla oblongata
Thalamus
What is the main function of the kidneys in the human body?
Regulation of blood sugar levels
Production of red blood cells
Filtration of blood and excretion of waste products
Digestion of food
Which of the following is a sex-linked genetic disorder?
Huntington's disease
Down syndrome
Hemophilia
Cystic fibrosis
Which species is believed to be the closest ancestor to modern humans?
Neanderthals
Homo erectus
Australopithecus afarensis
Homo habilis
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
What is the term for the maximum number of individuals of a species that an ecosystem can support indefinitely?
Carrying capacity
Population density
Limiting factor
Exponential growth
What is the process by which a seed begins to grow into a new plant?
Fertilization
Pollination
Germination
Photosynthesis
What is the primary driver of the current global biodiversity crisis?
Habitat loss
Climate change
Pollution
Invasive species
The human heart has how many chambers?
2
3
4
5