Question

Fill in the blanks:-

a) Essential factors for plants growth are warmth, air, water and ________.
b) Plants absorb water through ________.
c) Soil provides essential ________ to the plants.
d) _______ in soil is essential for soil fertility. ​

Answer 1

Answer:

A- sunlight

B- roots

C- minerals

D- moisture

Answer 2

Answer: A - sunlight

             B-the xylem

               C-Carbon, hydrogen and oxygen

                D-nutrients

Explanation: a) expalin=Plants need five things in order to grow: sunlight, proper temperature, moisture, air, and nutrients. These five things are provided by the natural or artificial environments where the plants live. If any of these elements are missing they can limit plant growth.

Explanation: b)Plants absorb water and nutrients through the xylem: a tissue made up of thin tubes located just below the surface of the plant's stems. The molecules in this tissue attract water molecules from the soil, so that the water is pulled upwards. This process is called capillary action.

Explanation: c)Carbon, hydrogen and oxygen, three of the essential plant nutrients, are taken up from the atmosphere and from water. The other essential nutrients come from the soil. The major nutrients, or macronutrients, supplied by the soil are nitrogen, phosphorus, potassium, sulphur, magnesium and calcium.

Expalnation: d)SOIL FERTILITY. Crops need nutrients just like people do. A fertile soil will contain all the major nutrients for basic plant nutrition (e.g., nitrogen, phosphorus, and potassium), as well as other nutrients needed in smaller quantities (e.g., calcium, magnesium, sulfur, iron, zinc, copper, boron, molybdenum, nickel)