Biology MCQs (Multiple Choice Questions) with answers for various state exams and UPSC civil services, SSC, banking, MPSC, UPPSC, MPPSC etc. Competitive Exams. Learn and prepare Objective type Questions on Biology.
1. Which of the following plants have fibrous roots?
Mango.
Banyan tree.
Grass.
Neem.
Answer: (c) Grass.
Solution: The roots originate from the base of the stem in the form of fibres, known as fibrous roots. It can be seen in wheat plants, grass, etc.
2. The pattern of arrangement of leaves on the stem or branch is called
Venation.
Phyllotaxy.
Inflorescence.
Tendril.
Answer: (b) Phyllotaxy.
Solution: The Phyllotaxy is the pattern of arrangement of leaves on the stem or branch. It is of three types - alternate, opposite and whorled.
3. The outermost whorl of the flower is
Sepals.
Calyx.
Petals.
Corolla.
Answer: (b) Calyx.
Solution: The Calyx is the outermost whorl of the flower. The calyx may be gamosepalous or polysepalous.
4. Which among the following is not the type of aestivation?
Valvate.
Twisted.
Imbricate.
Epipetalous.
Answer: (d) Epipetalous.
Solution: The mode of arrangement of sepals or petals in the floral buds with respect to the other membrane of the same whorl is called aestivation. The types of aestivation are valvate, twisted, imbricate, and vexillary.
5. The arrangement of ovules within the ovary is known as
Venation.
Aestivation.
Placentation.
Parthenocrapic.
Answer: (c) Placentation.
Solution: The arrangement of ovules within the ovary is known as placentation. The different types of placentation are marginal, axile, parietal, free central, and basal.