Which of the following is involved in secondary thickenin...
Which of the following is involved in secondary thickening in plants?
Collenchyma and xylem cells
Vascular cambium
Cork cambium and sclerenchyma
Vascular cambium and cork cambium
Correct answer is D
No explanation has been provided for this answer.
In animals the main protective covering is found in the ...
Which of the following conditions will cause a decrease in body temperature? ...
In which of the following is a cellulose cell wall present ...
The movement of the whole organism to an external stimulus is termed ...
The bright coloured eye spots on the wings of moth are an example of ...
In which part of the kidney does ultrafiltration take place? ...
The organisms with the least number of individuals in a pyramid of numbers are the ...
The maintenance of a constant internal environment in an organism is known as ...
The gradient of land can be measured with an instrument called a/an ...