Plant Anatomy and Physiology MCQ question and answer with solution | Biology Gk MCQs

Carboxylation reaction of phase I in Calvin cycle is catalysed by which of the following?

According to Niel's observation of photosynthesis,

Who among the following was first to work on embryo culture?

Consider the following statements regarding poloyembryony and choose the correct answer:
1. False polyembryony includes the development of two or more embryo sacs within the Same nucellus, and the embryos are derived from different embryo sacs
2. In cleavage polyembryony, the zygote instead of giving rise to one embryo produces embryos by cleavage
3. According to Jeffrey (1895), in Erythronium americanum the "embryogenic mass" forms two or three embryos

In which of the following monocotyledons, two cotyledons are formed instead of one?

Which of the following plants bears protogynous flowers?

Consider the following statements and choose the correct answer:
1. Low temperatures inhibit germination of the light-sensitive Grand Rapids lettuce seeds
2. High temperatures inhibit germination of the light-sensitive Grand Rapids lettuce seeds
3. High temperatures can substitute for red-light promotion of light-sensitive lettuce seeds
4. Low-temperature promotion of lettuce seed germination is less efficient with respect to time than is red-light promotion

Ribulose biphosphate carboxylase, the main enzyme of Calvin cycle that fixes CO₂, acts as ribulose biphosphate oxygenase under

When chlorophyll solutions are treated with dilute acids, a waxy olive-green substance is produced known as

The infectious plant diseases which spread widely but occur periodically are called