State true(T) or false(F) to the given statements and select the correct option.
( a ) All tissue layers exterior to the vascular cambium constitute bark.
( b ) Root podermis is sclerenchymatous.
( c ) Ground tissue of leaves is called mesophyll.
( d ) Due to presence of casparian strips, endodermis is impervious to water.

Read the following statements, state true (T) or false (F) for them and select the correct option. (a) Cleistogamous flowers prevent geitonogamy as well as xenogamy. (b) Double fertilisation occurs in all spermatophytes. (c) In pea family, the single cotyledon is called scutellum. (d) Seeds of castor and coconut retain a part of endosperm during embryo development.

select true (T) or false (F) for the following statements and choose the correct option. A. QB bacteriophage has RNA as genetic material. B. Free 2'OH of RNA makes it more labile and easily degradable. C. The experiment of Hershey and chase gave unequivocal proof that DNA is the genetic meterial.

Identify the following statements as true ( T) or false (F ) for genetic diversity and select the correct option : ( A ) Genetic diversity is a diversity shown by a single species at genetic level ( B ) It is total genetic information contained in all individuals of a community. ( C ) Rauwolfia vomitoria shows the variation in the term of concentration of active chemical reserpine. ( D ) India has more than 50000 genetically different strains of mango.

Read the following statements and select the correct option. Statement-1: Anatomically, all the tissues present on the inner side of endodermis such as pericycle, vascular bunbles and pitch constitute the stele. Statement-2: Eustele is the stele in which vasuclar bundles are arragned in the form of a ring as present in dicot stems.

Select true (T) and false (F) in following given statements and choose the correct option given below.(a) Receptors for cannabinoids are present on cardiovascular system of the body (b) Cocaine causes hallucinations in large dosage by stimulating CNS (c)Diacetylmorphinis commonly known as smack (d) Heroin is a CNS stimulant and increases body functions

Select true (T) or false (F) for the following statements and choose the correct option. A. QB bacteriophage has RNA as is material. B. Free 2'0H of RNA makes it more labile and easily degradable. C. The experiment of Hershey and Chase gave unequivocal proof that DNA is the genetic material. A B C

Identify the statements as true (T) or false (F) w.r.t secondary growth in root and choose the correct option. I. Vascular cambium is partially secondary in origin. II. Vascular cambium is formed as continuous and complete but wavy ring. III. Cork cambium arises from cortical cells.