INTRODUCTION Our understanding of the plant kingdom has changed overtime. Fungi and members of the Monera and Protista having cell walls have now been excluded from plantae. Cyanobacteria that are also referred to as blue green algae anyone. In plant kingdom, we describe algae, bryophytes, pteridophytes, gymnosperms and angiosperms. CLASSIFICATION SYSTEMS OF PLANT KINGDOM ARTIFICIAL … Read more
Introduction In biological classification, there have been many attempts to classify living organisms since the dawn of civilisation. Aristotle was the earliest to attempt a more scientific basis for biological classification. He used simple morphological characters to classify plants into trees, shrubs and herbs. He also divided animals into two groups, with RBCs and without RBCs … Read more
ANIMAL MORPHOLOGY- ASSERTION-REASON TYPE 1.A:- Cockroach undergoes paurometabolous development. R:- Development of cockroach is direct. 2. A:- Cockroaches are uricotelic organisms. R:- Malpighian tubules absorb uric acid from body fluid, which is excreted out through hind gut. 3. A:- Body of earthworm is divisible into about 100-120 metameres. R:- Pre-clitellar, clitellar and post-clitellar are three … Read more
COCKROACH ANATOMY TRUE OR FALSE 1.The hindwings are opaque and leathery and are used in flight. 2. The mouth parts consisting of a labium (upper lip), a pair of mandibles, a pair of maxillae and a labrum (lower lip). 3.The anterior end of head bears appendages forming biting and chewing type of mouth parts. 4. … Read more
STRUCTURAL ORGANISATION IN ANIMALS:- ANIMAL TISSUES NEET PREVIOUS YEAR QUESTIONS 1.Which of the following statements wrongly represents the nature of smooth muscle? [NEET 2021] (1) These muscles are present in the wall of blood vessels. (2) These muscles have no striations. (3) They are involuntary muscles. (4) Communication among the cells is performed by intercalated … Read more
ASSERTION-REASON TYPE In the following questions, a statement of assertion (A) is followed by a statement of reason(R). (1) If both Assertion & Reason are true and the Reason is the correct explanation of Assertion then mark (1) (2) If both Assertion & Reason are true but the Reason is not correct explanation of the … Read more
NCERT QUESTIONS TRUE OR FALSE (T OR F) STRUCTURAL ORGANIZATION IN ANIMALS:ANIMAL TISSUES 1.Arrival of the disturbance at the neuron‘s endings, or output zone, triggers events that may cause only stimulation of adjacent neurons and other cells. 2. The structure of the cells does not vary according to their function when shapes of structures of … Read more
PREVIOUS YEARS QUESTION CELL CYCLE AND CELL DIVISION 1. Identify the correct statement with regard to G1 phase (Gap 1) of interphase. [NEET 2020] (1) Reorganization of all cell components takes place. (2) Cell is metabolically active, grows but does not replicate its DNA. (3) Nuclear Division takes place. (4) DNA synthesis or replication takes … Read more
ASSERTION-REASON:- In the following questions, a statement of assertion (A) is followed by a statement of reason (R). (1) If both Assertion & Reason are true and the Reason is the correct explanation of Assertion then mark (1) (2) If both Assertion & Reason are true but the Reason is not correct explanation of the … Read more
TRUE OR FALSE (T OR F) 1.The cells in quiescent stage do not divide. 2. DNA replication does not occur when the cell is in its resting phase. 3. The duration of interphase for all type of cells in an organism such as human is the same. 4. In organism, growth is considered in terms … Read more