Flashcards : Fundamentals of Biological Diversity — 24 cartes

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1Question

Kingdom Monera — definition?

Réponse

Consists solely of bacteria, prokaryotic organisms.

2Question

Prokaryotic cells — features?

Réponse

Lack a nucleus, have cell walls, and are usually unicellular.

3Question

Mycoplasma — characteristic?

Réponse

Bacteria lacking a cell wall, smallest living cells.

4Question

Viruses — nature?

Réponse

Acellular entities requiring a host to replicate.

5Question

Viroids — composition?

Réponse

Small infectious RNA molecules without a protein coat.

6Question

Prions — cause?

Réponse

Infectious proteins causing neurodegenerative diseases.

7Question

Lichens — symbiosis?

Réponse

Fungi and photosynthetic algae or cyanobacteria.

8Question

Plant leaves — main function?

Réponse

Photosynthesis and gas exchange.

9Question

Vascular bundles — location?

Réponse

In stems and leaves, for transport of water and nutrients.

10Question

Photosynthesis pigments — role?

Réponse

Absorb light energy for converting CO2 and water into glucose.

11Question

Glycolysis — location?

Réponse

Cytoplasm, breaks down glucose anaerobically.

12Question

Krebs cycle — location?

Réponse

Mitochondrial matrix, oxidizes acetyl-CoA.

13Question

Electron transport chain — purpose?

Réponse

Produces ATP by creating a proton gradient.

14Question

Plant hormones — examples?

Réponse

Auxins, gibberellins, cytokinins.

15Question

Auxins — role?

Réponse

Promote cell elongation and root initiation.

16Question

Cell organelles — site of ATP?

Réponse

Mitochondria.

17Question

Enzymes — classification basis?

Réponse

Type of reaction catalyzed, e.g., oxidoreductases.

18Question

Hormones — target?

Réponse

Specific cells or organs with receptors.

19Question

Pollination — process?

Réponse

Transfer of pollen from anther to stigma.

20Question

Fertilization — event?

Réponse

Fusion of sperm and ovum.

21Question

DNA replication — key enzyme?

Réponse

DNA polymerase.

22Question

Gene regulation — mechanism?

Réponse

Transcription factors and epigenetic modifications.

23Question

Population density — definition?

Réponse

Number of individuals per unit area or volume.

24Question

Biodiversity — importance?

Réponse

Ensures ecosystem stability and resilience.

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