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

Which of the following is the component of water potential influenced by the presence of a matrix?

By which of the following means of adaptation the animals orient themselves to face into current and move upstream?

The ocean is continuous throughout the world except for the deep water of the

Consider the following statements and choose the correct answer:
1. In order to increase the photosynthetic efficiency leaf area index should be increased
2. To increase leaf area index plants should be with horizontal leaves
3. If the time of grain-growth is increased, the grain-yield will decrease
4. Photosynthetic efficiency can be increased by monitoring moisture stress, transpiration loss and light intensity

The pressure imposed on a lake-dwelling organism is

If we subject a plant to continuous red light, the level of phytochrome in the plant

Consider the following statements and choose the correct answer:
1. Roots of grasses are an excellent binding material and keep the soil intact
2. Disruption of the grass cover by the plough loosens the soil and makes it vulnerable to removal by the force of rain or strong winds
3. Tilling or grazing on slopes or semi-arid soils decreases the rate of soil erosion
4. Soil erosion is especially high in Nepal, India, China, Australia, Spain, USSR, USA and Central Africa

The ratio of energy flowing between various trophic levels are expressed as

As the male gametes in angiosperms have to travel through the pollen tube to reach the egg, the process of sexual fusion is called

Which of the following is a copper-containing protein?