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Higher – Unit 3 Growth and development Chapter 27- Quiz 2
1- What is the name of the region of a plant situated between the division and the differentiation zone?
2- Which types of meristems are responsible for primary growth in plants?
3- In a stem vascular bundle, where can the cambium be found?
4-What conditions can result in the formation of narrow annual rings in a wooden stem? (give two examples)
5- Define growth
6- What is the name of the gene to which the repressor binds in the lac operon?
7- Which organism has a growth curve resembling stairs?
8- Which type of gland produces hormones in the human body? Give 2 examples.
9- What is the name of the hormone synthesised by the thyroid?
10- Is leaf abcission caused by high or low levels of IAA?
11- In the barley grain, which part produces α- amylase?
12- What is the effect of low concentration of IAA on roots?
Answers 1- Elongation zone (1) 2- Apical meristems(1) 3- Between the xylem and the phloem (1) 4- Cold conditions, dry conditions, leaf loss (3) 5- An irreversible increase in DRY mass (1) 6- Operator 7- Insects 8- Endocrine glands, thyroid, anterior pituitary 9- Thyroxine 10- Low 11- Aleurone layer 12- Increased rate of growth
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