Question
What is a ‘food web’? Show its formation.

Answer

The interconnected food chains operating in an ecosystem which establish a network of relationships between various species is called a food web. In this food web, we can see a network of numerous pathways along which the food flows within grass land community. This food web starts from the plants which is producer and end in top carnivore hawk.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

What would your image look like if you stood dose to a large:
  1. Convex mirror?
  2. Concave mirror?
Give reasons for your answer.
A 4 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 24 cm. The distance of the object from the lens is 16 cm. Find the position, size and nature of the image formed, using the lens formula.
A concave lens has focal length 15cm. At what distance should the object from the lens be placed so that it forms an image at 10cm from the lens? Also find the magnification produced by the lens.
Describe some of the problems associated with the construction of dams.
What is the difference between a voluntary and an involuntary action? Which kind of action is digestion? Explain your choice.
A cross was carried out between a pure bred tall pea plant and a pure bred dwarf pea plant and $\text{F}_{1}$progeny was obtained. Later, $\text{F}_{1}$ the progeny was selfed to obtain $\text{F}_{2}$progeny. Answer the following questions:
  1. What is the phenotype of the $\text{F}_{1}$ progeny and why?
  2. Give the phenotypic ratio of the $\text{F}_{2}$ progeny.
  3. Why is the $\text{F}_{2}$ progeny different from the $\text{F}_{2}$ progeny?
What is nuclear fusion? Explain with an example. Write the equation of the reaction involved.
Define ‘hormones’. Name the hormone secreted by thyroid. Write its function. Why is the use of iodised salt advised to us?
i. Name the spherical mirror used as:
a. shaving mirror
b. Rear view mirror in vehicles
c. Reflection in search-light.
ii. Write any three difference between a real and a virtual image.
What is nuclear fission? Explain with an example. Write the equation of the nuclear reaction involved.