What is an algal bloom? | Class 12 Biology Chapter Environmental Issues, Environmental Issues NCERT Solutions

Name a microbe used for the production of Swiss cheese.

Name the scientists who were credited for showing the role of Penicillin as an antibiotic?

Give one example for each of the following types.
a) Migratory animal
b) Camouflaged animal
c) Predator animal
d) Biological control agent
e) Phytophagous animal
f) Chemical defense agent

Lianas are vascular plants rooted in the ground and maintain erectness of their stem by making use of other trees for support. They do not maintain direct relation with those trees. Discuss the type of association the lianas have with the trees.

Give one example for each of the following:
i. Eurythermal plant species _______________
ii. A hot water spring organism _______________
iii. An organism seen in deep ocean trenches _______________
iv. An organism seen in compost pit _______________
v. A parasitic angiosperm _______________
vi. A stenothermal plant species _______________
vii. Soil organism _______________
viii. A benthic animal _______________
ix. Antifreeze compound seen in antarctic fish _______________
x. An organism which can conform _______________

What are the three types of ecological pyramids. What information is conveyed by each pyramid with regard to structure, function and energy in the ecosystem.

A farmer was facing the problem of low yield from his farm. He was advise to keep a beehive in the vicinity. Why? How would the beehive help in enhancing yield?