Nutrition

The A, B and C are three living organisms. The organism A is a unicellular fungus which can live without air. It is used in the commercial production of an organic compound P from molasses. The organism B is a unicellular animal which lives in water and feeds and moves by using pseudopodia. It breathes through an organelle Q. The organism C is a tiny animal which acts as a carrier of the malarial parasite. It breathes and respires through a kind of tiny holes R and air-tubes S in its body.

What is organism B and organelle Q?

Match the organisms given in column I with the processes given in column II.

Assertion: Haemoglobin contains iron.
Reason: Iron deficiency leads to anaemia.

What represents by the label A in the given picture?

State one function of leaf midrib. 

Medicinal leaches have all except:

Leaches are mostly ectoparasites, but few are predators.

Saliva of leeches contain an anticoagulant, called as  _____ (hirudin/heparin/histamine).

How the transportation of material is different for xylem (X) and phloem (P)?

Draw the cross-section of a leaf and label the xylem and phloem.

Write two functions of vascular bundles that helps plants to survive and grow.

Lice are the obligate parasites.

Lice show symbiotic association with _____ (bacteria/virus).

A common mode of nutrition in lice and leech:

Leaf veins maintain _____ (water potential/turgor pressure).

Veins allow us to measure photosynthetic capacity.

Select the incorrect statement about the leaf vein.

Draw a diagram to show leaf veins.

In the cytoplasm of the Amoeba, the food vacuoles fuse with ribosomes for the digestion of food particles.

Explain how does the presence of a cuticle layer on the different parts of cactus plants be advantageous.