Kingdom Monera — definition?
Consists solely of bacteria, prokaryotic organisms.
Prokaryotic cells — features?
Lack a nucleus, have cell walls, and are usually unicellular.
Mycoplasma — characteristic?
Bacteria lacking a cell wall, smallest living cells.
Viruses — nature?
Acellular entities requiring a host to replicate.
Viroids — composition?
Small infectious RNA molecules without a protein coat.
Prions — cause?
Infectious proteins causing neurodegenerative diseases.
Lichens — symbiosis?
Fungi and photosynthetic algae or cyanobacteria.
Plant leaves — main function?
Photosynthesis and gas exchange.
Vascular bundles — location?
In stems and leaves, for transport of water and nutrients.
Photosynthesis pigments — role?
Absorb light energy for converting CO2 and water into glucose.
Glycolysis — location?
Cytoplasm, breaks down glucose anaerobically.
Krebs cycle — location?
Mitochondrial matrix, oxidizes acetyl-CoA.
Electron transport chain — purpose?
Produces ATP by creating a proton gradient.
Plant hormones — examples?
Auxins, gibberellins, cytokinins.
Auxins — role?
Promote cell elongation and root initiation.
Cell organelles — site of ATP?
Mitochondria.
Enzymes — classification basis?
Type of reaction catalyzed, e.g., oxidoreductases.
Hormones — target?
Specific cells or organs with receptors.
Pollination — process?
Transfer of pollen from anther to stigma.
Fertilization — event?
Fusion of sperm and ovum.
DNA replication — key enzyme?
DNA polymerase.
Gene regulation — mechanism?
Transcription factors and epigenetic modifications.
Population density — definition?
Number of individuals per unit area or volume.
Biodiversity — importance?
Ensures ecosystem stability and resilience.
Testez vos connaissances avec un QCM de 12 questions sur Fundamentals of Biological Diversity.
1. What is the primary function of the cytoskeleton?
2. What does enzyme classification primarily depend on?
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