Transport of food material in higher plants takes place through
companion cells
transfusion tissue
tracheids
tracheids
D.
tracheids
Sieve elements are the food conducting cells of phloem tissue. Sieve element in angiosperms are sieve tubes, while in gymnosperms and pteridophytes, these are sieve cells.
Kranz anatomy is one of the characteristics of the leaves of
potato
wheat
sugarcane
sugarcane
Three of the following statements about enzymes are correct and one is wrong. which one is wrong?
Enymes require optimum pH for maximal activity
Enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperatures 80o-90o C
Enzymes are highly specific
Enzymes are highly specific
An elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in the maintenance of cell shape is called
thylakoid
endoplasmic reticulum
plasmalemma
plasmalemma
ABO blood grouping is controlled by gene I, which has three alleles and show codominance, There are six genotypes. How many phenotypes in all are possible.?
Six
Three
Four
Four
Crocodile and penguin are similar to whale and dogfish in which one of the following features?
possess a solid single -stranded central nervous system
lay eggs and guard them till they hatch
possess a bony skeleton
possess a bony skeleton
Black (stem) rust of wheat is caused by
Alternaria solani
Ustilago nuda
Puccinia graminis
Puccinia graminis
Jaundice is a disorder of
excretory system
skin and eyes
digestive system
digestive system
