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6. _____ layer that helps maintain blood pressure by stretching and springing back.
- Elastic
- Fat
- Springy
- Muscle
7. Molecule that carries oxygen molecules from the lungs to respiring muscle cells.
- Haemoglobin
- Red blood cells
- Glucose
8. What one bacterium passes to another through the (16) tube.
- Plasmid
- Linear ribosome
- Lipase
9. Pathway water can move through the cytoplasms of cells.
- Symplastic
- Apoplastic
- Transpirational
10. Meiosis occurs in cells called _______.
- Sperm and eggs
- Gametes
- Meiotic cells
11. Name given to plants adapted to survive in dry conditions.
- Pioneers
- Xerophytic
- Zerophytic
12. Agriculture normally reduces genetic _______.
- Diversity
- Pool size
- Variation
13. Horizontal gene transmission is where on bacterium inserts a __________ tube into another.
- Informational
- Conjugation
- Joining
14. Pathway water can move through spaces in cell walls.
- Apoplastic
- Symplastic
- Transpirational
15. Taxonomic group beginning with 'O'.
16. Half the number of chromosomes.
- Haploid
- Diploid
- Half-chromosomal
17. Haemaglobin has an ________ for oxygen.
- Attraction speed
- Association
- Affinity
- Association curve
18. The name of non-coding DNA.
- Intron
- Codon
- Exon
- Incodon
19. Highest taxonomic group.