Question

1. Discuss the role of decomposers in an ecosystem. 2. Give the physio-chemical characteristics of temperate rainforests. 3. Why is transpiration regarded as necessary evil? 4. Write deficiency diseases caused by lack of essential nutrients in plants. 5. Why are there no predators for lions and tigers? 6. Describe various types of movements of molecules seen during absorption of water and minerals from the soil by the plant.​

Answer 1

Answer:

Decomposers play a critical role in the flow of energy through an ecosystem. They break apart dead organisms into simpler inorganic materials, making nutrients available to primary producers.

As we all know, transpiration is the natural process of removing the excess water in the form of vapours from the aerial parts of the plant called stomata. ... Transpiration is called necessary evil because the increase in the rate of transpiration results in drying up (wilting) of the leaves

The tropical rainforest biome has four main characteristics: very high annual rainfall, high average temperatures, nutrient-poor soil, and high levels of biodiversity (species richness). Rainfall: The word “rainforest” implies that these are the some of the world's wettest ecosystems.

Poor growth and a variety of disorders such as leaf discolouration (chlorosis) can be caused by a shortage of one or more plant nutrients.

...

Nutrient deficiencies

Boron deficiency.

Calcium deficiency.

Iron deficiency.

Magnesium deficiency.

Manganese deficiency.

Molybdenum deficiency.

Nitrogen deficiency.

Phosphorus deficiency.

Lions and tigers do not have any predators because according to food chain they are the top most consumer or top carnivores , so in the food chain no other species is available to act as predators for them

Answer: By the process of osmosis, water and minerals are absorbed from the soil by roots and transported to various parts of the plants through xylem tissues. ... The loss of water in vapour form from the leaf into the atmosphere is called transpiration. This creates a suction which pulls water from xylem cells.