Biological Classification — BIOLOGY STD 11 Science — Question

Write any four symptoms of Mycoplasma.

Prakhar, a class XI student went out after rains in the garden. He saw earthworms on the ground and wondered how they are able to move, eat and perform various function of life Next day, he went to his biology teacher and asked her about the same. Her biology teacher politely explained him about how different animals have various levels of organisation of cells. She also told her that except sponges and coelenterates, all the animals of the kingdom-Animalia have organ- system level of organisation.

1. What kind of body organisation are present in sponges and coelenterates?
2. Write about the organisation type in lower animals, like protozoans.
3. In which phylums organ system level organisation is found?
4. What values are shown by Prakhar?

ATP is called the energy currency of the cell. In our life, we can compare ATP with which of the following? What could have happened if there were no mechanism of storing the energy in the form of ATP?

1. ATM Machine.
2. Bank account.
3. Currency notes.

Biology teacher was teaching cell cycle in the class. She taught that cell is the basis from which life exists. Also explained well about cell cycle. Robin who was a bright student was facing difficulties in understanding the topic he reached home and asked her sister who is a student of biology in a college about details of cell cycle and cell theory. She explained him that according to cell theory, cells arise from pre-existing cells and the process involved is cell division. Sexually reproducing organisms start their life from a single cell, called zygote, and cell divisions do not stop with the formation of a mature organism, but continue throughout the life.

1. What is meant by cell cycle?
2. Which is the actual phase of cell division?
3. When (at what phase) do the cell organelles duplicate?
4. What values are reflected from the Robin's concern?

International Code of Botanical Nomenclature (ICBN) has provided a code for classification of plants. Give hierarchy of units of classification botanists follow while classifying plants and mention different ‘Suffixes’ used for the units.

Draw a diagram of alimentary canal of cockroach and label any six parts in it. (Description is not required)

Describe chemiosmosis.

What is aestivation? Make a picture of the flowers of mustard plant (family Brassicaceae) and write the flower formula.

List out any five diagnostic features of family-Liliaceae.