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 hypodermis is sclerenchymatous. (c) Ground tissue of leaves is called mesophyll.(d) Due to presence of casparian strips, endodermis is impervious to water.

State true (T) or false (F) for the given statements and choose the correct option. Br (a) Seeds of Pinus cannot germinate properly without mycorrhizal associations br (b) During passive absorption of water by roots a positive pressure is developed in xylem.

State true(T) or false(F) to the given statements and select the correct option. ( a ) Annual rings are distinct in plants growing in temperate regions. ( b ) Lenticels occur in most woody trees and permit the exchange of gases. ( c ) Due to stelar secondary growth, central cylinder of wood surrounded by secondary phloem is formed. ( d ) The cells of endodermis opposite to protoxylem divide to give rise vascular cambium in dicot roots.

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.

Study the given statements carefully and give the answer. (A)Bark is a nontechnical term that refers to all tissues exterior to the vascular cambium only (B)Phellem, phellogen and phelloderm are collectively called pericarp. (C)In the dicot stem vascular cambium is completely secondary in origin. (D)In dicot stem endodermis cells are rich in starch grains and the layer is also called starch sheath.

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.

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

Identify the following statements is true ( T) or false (F ) for genetic diversity and select the correct option : (A) Genetic diversity is a diverstiy 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 bundles and pith constitute the stele. Statement-2: Eustele is the stele in which vascular bundles are arranged in the form of a ring as present in dicot stems.

Read the following statements about phylum Annelida. Identify the true and false statements and select the correct option after referring to the given table . A. Annelids are diploblastic , metamerically segmented , coelomate animals. B. Their neural system consists of paired ganglia connected by lateral nerves to a single ventral nerve cord . C. They process longitudinal and circular muscle fibres which help in locomotion . D Nephridia help them in osmoregulation and excretion.

Read the following three statements (A-C) and select the option which includes all the correct ones only: i. During the primary growth of the plant, specific regions of the apical meristem produce dermal tissue, ground tissue and vascular tissue. ii. In plants, growth is restricted to specialized regions of active cell division iii. Secondary meristems are also known as cylindrical meristems.