Plant Kingdom Quiz-20
Dear Readers,
NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions.
About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus.
Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced.
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Q1. Holdfast, stipe and frond constitutes the plant body in case of
Solution
(c) Laminaria is the example of class-Phaeophyceae. In this case, the plant body is usually attached to the substratum by a holdfast and has a stalk, the stripe and leaf like photosynthetic organ the frond
(c) Laminaria is the example of class-Phaeophyceae. In this case, the plant body is usually attached to the substratum by a holdfast and has a stalk, the stripe and leaf like photosynthetic organ the frond
Q2. In homosporous pteridophyte, the gametophyte is
Solution
(b) The spores are homosporous and germinate to produce independent cushion-like monocious gametophyte
(b) The spores are homosporous and germinate to produce independent cushion-like monocious gametophyte
Q3. In case of heteroporous pteridophyte the gametophyte is
Solution
(a) Heterosporous pteridophytes like Selaginella and Marsilea always produce dioecious gametophyte because microspore will form male gametophyte and megaspore will form female gametophyte
(a) Heterosporous pteridophytes like Selaginella and Marsilea always produce dioecious gametophyte because microspore will form male gametophyte and megaspore will form female gametophyte
Q4. kelp (branched form) and saargassam (filamentous form) belongs to
Solution
(b) Brown algae show great variation in size and form. They range from simple branched, filamentous forms (Ectocarpus) to profusely branched forms as represented by kelps, which may reach a height of 100 metres. The giant brown algae are called kelps. The largest kelps are Nereocystis (20-30 m) and Macrocystis (40-60 m)
(b) Brown algae show great variation in size and form. They range from simple branched, filamentous forms (Ectocarpus) to profusely branched forms as represented by kelps, which may reach a height of 100 metres. The giant brown algae are called kelps. The largest kelps are Nereocystis (20-30 m) and Macrocystis (40-60 m)
Q5. Sporophytic generation is dominant phase in the life cycle of
Solution
(b) Dominant phase in ferns is sporophyte, which is differentiated into root (2n), stem and leaf
(b) Dominant phase in ferns is sporophyte, which is differentiated into root (2n), stem and leaf
Q6. Which economically important product is obtained from cycascircinalis?
Solution
Sago is obtained from the pith of It is rich in starch and used as constituent of poor man’s food.
Sago is obtained from the pith of It is rich in starch and used as constituent of poor man’s food.
Q7. Fern spores are usually
Solution
(a) In pteridophytes, spore is a haploid structure, which develops after meiosis in the spore mother cell. On germination, it gives rise to a green haploid prothallus (gametophyte) which is monoecious, has both antheridia (male sex organs) and archegonia (female sex organs).
(a) In pteridophytes, spore is a haploid structure, which develops after meiosis in the spore mother cell. On germination, it gives rise to a green haploid prothallus (gametophyte) which is monoecious, has both antheridia (male sex organs) and archegonia (female sex organs).
Q8. In angiosperms endosperm is
Solution
(a) In pteridophytes, spore is a haploid structure, which develops after meiosis in the spore mother cell. On germination, it gives rise to a green haploid prothallus (gametophyte) which is monoecious, has both antheridia (male sex organs) and archegonia (female sex organs).
(a) In pteridophytes, spore is a haploid structure, which develops after meiosis in the spore mother cell. On germination, it gives rise to a green haploid prothallus (gametophyte) which is monoecious, has both antheridia (male sex organs) and archegonia (female sex organs).
Q9. Zygote of spirogyra produces four haploid nuclei in which
Solution
(a) The united protoplasmic mass of two gametes is called zygospore (zygote). Prior to germination, the diploid zygospore nucleus undergoes meiosis and forms four nuclei, three of these abort and only one is functional. It undergoes transverse division to give rise single filament.
(a) The united protoplasmic mass of two gametes is called zygospore (zygote). Prior to germination, the diploid zygospore nucleus undergoes meiosis and forms four nuclei, three of these abort and only one is functional. It undergoes transverse division to give rise single filament.
Q10. Ovules are borne on
Solution
(b) In all cycads except the genus Cycas, the ovules are borne on megasporophylls in megastrobili, in Cycas the ovules develop on individual leaf-like megasporophylls in what is regarded as a primitive arrangement. The microspores of all cycads develop into microstrobili
(b) In all cycads except the genus Cycas, the ovules are borne on megasporophylls in megastrobili, in Cycas the ovules develop on individual leaf-like megasporophylls in what is regarded as a primitive arrangement. The microspores of all cycads develop into microstrobili
