imp questions in kingdom plantae
Answers
Answer:
Long Answer Type Questions
Q.1. How is gametophyte a dominant phase in the life cycle of bryophytes?
A.1. Gametophyte bears the male reproductive organ antheridia and female reproductive organ archegonia, thereby, producing male gametes (antherozoids) and female gametes (egg cell). A gametophyte is a dominant form and the most familiar phase of the life cycle of bryophyte. The antherozoid fuses with the egg to produce a zygote. Zygote forms a multicellular body known as the sporophyte.
Q.2. Describe the life cycle of a plant.
A.2. The life cycle of a plant starts as a seed. The seed germinates and grows like a plant. The plant produces flowers which produce seed in fruit on fertilization. The plant dies and leaves seeds behind which germinate to form a new plant.
Q.3. What do you mean by double fertilization and triple fusion?
A.3. In this process, one male gamete fertilizes the egg and forms a diploid zygote. The other male gametes fuse with the two polar nuclei forming a triploid zygote that develops into the endosperm. This is known as double fertilization. The three haploid nuclei fuse to form endosperm. It is known as triple fusion.
Q.4. What are parasitic algae?
A.4. Parasitic algae are also called as the common plant pathogen. These species of algae are most commonly seen in warm, humid climates and are usually found in the leathery leaf plants such as litchi, hollies, magnolias, and viburnums. Parasitic algae are the major causes of foliar disease and red rust of tea leaf. Cephaleuros is an example of parasitic green algae.
Explanation: