22. One gro uping of gymnosperms has been particular successful in mountainous r
ID: 280146 • Letter: 2
Question
22. One gro uping of gymnosperms has been particular successful in mountainous region that can get both very cold and very dry during different seasons. Which of the following can explain their success in these environments over other plants? The thin needle-like leaves of conifers helps reduce water loss during dry months and allows snow to fall through during winter months preventing branch and trunk damage from excess snow weight The wide broad leaves of ginkgophytes provides insulation during cold months and greater heat release during warm months Many gymnosperms can completely dry out during the dry months and then can be restored to full health with sufficient water during wet months All of them a. b. c. d. 23. Which of the following structures in a flower is not directly involved in reproduction? a. The style b. The sepal c. The stamen d. The anther 24. Plants are a source of: a. Medicine b. Food c. Fuel d. All of these 25. Which of the following illustrated a major advantage of angiosperms over gymnosperms? Flowers evolved as a way to attract animals to help in pollen dispersal Gymnosperms produced pollen as a way to disperse gametes, angiosperms evolved flowers and therefore didn't need pollen anymore since animals would spread seeds directly after visiting different flowers. Anglosperm pollen and seeds became more watertight meaning they could survive in dryer climates a. b. c.Explanation / Answer
22
Answer is A
The thin needle like leaves of conifers helps reduce water loss during dry months and allows snow to fall through during winter months
23
Answer is B
A typical flower has four parts Sepals, petals, Stamens and Pistil. Sepals and petals donot directly take part in reproduction hence called non-essential whorls.
Stamens and pistil (essentail whorls) are male and female reproductive parts respectively.
A stames is made up of filament, connective and anther and a pistil is made up of Stigma, style and overy
24
Answer is D
Plants provide medicine food as well as fuel
25
Answer is A
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