Read and download free pdf of CBSE Class 10 Biology Control And Coordination Worksheet Set A. Students and teachers of Class 10 Biology can get free printable Worksheets for Class 10 Biology in PDF format prepared as per the latest syllabus and examination pattern in your schools. Standard 10 students should practice questions and answers given here for Biology in Grade 10 which will help them to improve your knowledge of all important chapters and its topics. Students should also download free pdf of Class 10 Biology Worksheets prepared by school teachers as per the latest NCERT, CBSE, KVS books and syllabus issued this academic year and solve important problems provided here with solutions on daily basis to get more score in school exams and tests
Control And Coordination Class 10 Biology Worksheet Pdf
Class 10 Biology students should refer to the following printable worksheet in Pdf for Control And Coordination in standard 10. This test paper with questions and answers for Grade 10 Biology will be very useful for exams and help you to score good marks
Class 10 Biology Worksheet for Control And Coordination
Question : Which of the following is not the function of Auxins
A. cell enlarge mnt
B. Induces dormancy
C. Root formation
D. Over come apical dominance secreted by posterior lobe
a. A and D
b. B and D
c. B and C
d. All of these
Answer : B
Explanation: The main function of auxin is to help plants grow. Auxin stimulates plant cells to elongate, and the apical meristem of a plant is one of the main places that auxin is produced.
Question : What is BMR?
a. Basic metabolic rate
b. Basal metabolic respiration
c. Basal metabolism rate
d. Basic metabolic respiration
Answer : C
Explanation: BMR stands for Basal metabolic rate, and it refers to number of calories that human body needs to function is called basal metabolic rate.
Question : Internal activities are controlled by:-
a. CNS
b. ANS
c. PNS
d. None of these
Answer : A
Explanation: Central nervous system (CNS) controls the activities of internal organs such as hormone release, movement of food through the stomach and intestines, and the sensations from and muscular control to all internal organs.
Question : What is the difference between a reflex action and walking?
Answer : A reflex action is voluntary action which is a rapid and automatic response to stimuli while walking is a voluntary action which requires our thinking and in our control.
Question : What happens at the synapse between two neurons?
Answer : A synapse is the gap between the two neurons. At synapse the electrical signals converted into chemicals that can easily cross over the gap and pass on to the next neurons where it again converted into electrical signals.
Question : Name the endocrine part of pancreas.
Answer : The endocrine pancreas refers to those cells within the pancreas that synthesize and secrete hormones. The endocrine portion of the pancreas takes the form of many small clusters of cells called islets of Langerhans or, more simply, islets.
Question : What is the simplest kind of nerve pathway?
Answer : The path through which nerves signals involved in a reflex action travel is called the reflex arc.
Question : Which part of the brain maintains posture and equilibrium of the body?
Answer : Cerebellum
Question : How do we detect the smell of an agarbatti (incense stick)?
Answer : When the smell of the incense stick reaches to our nose then the olfactory receptors present in our nose detect it and send this information in fore brain in the form of electrical signals. Fore brain interprets this information as the smell of incense stick where it is already stored.
Question : What is the role of the brain in reflex action?
Answer : Brain has no direct involvement in reflex action. It is mainly controlled by Spinal Cord as this action not requires thinking and is very quick action.
Question : What are plant hormones?
Answer : Plant hormones are the fluids which are secreted within the plant, also known as phytohormones. Plant hormones regulate the growth and development of the plant. Examples of plant hormones are auxins,gibberellins, cytokinins, Abscisic acid and ethylene.
Question : How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?
Answer : The movements of the leaves of the sensitive plant are touch sensitive and independent of growth, while the movement of the shoot towards light is growth related and known as phototropism.
Question : Give an example of a plant hormone that promotes growth.
Answer : Auxins.
Question : Why homologous series of carbon compounds are so-called? Write the chemical formula of two consecutive members of a homologous series and state the part of these compounds that determines their
(i) Physical properties, and (ii) chemical properties.
Answer : Carbon compounds are named as homologous series because they are derived from same general formula, having same functional group, similar chemical properties and show gradation in physical properties. Each member differs from successive member by - CH2
The two consecutive members of alkane series are methane (CH4) and ethane (C2H6).
These members of a homologous series show gradual change in their physical properties with increase in molecular masses. Their molecular masses and functional groups determine their physical and chemical properties, respectively.
Question : How do auxins promote the growth of a tendril around a support?
Answer : When tendrils come in contact with any support, the part of the tendril in contact with the object does not grow as rapidly as the part of the tendril away from the object. This is caused by the action of auxin hormone. Less auxin occurs on the side of contact as compared to the free side as a result, auxin promotes growth on the free side and the tendrils coil around the support.
Question : Why is the flow of signals in a synapse from axonal end of one neuron to dendritic end of another neuron but not the reverse?
Answer : When an electrical signal reaches the axonal end of a neuron, it releases a chemical substance. This chemical diffuses towards the dendrite end of next neuron where it generates an electrical impulse or signal. Hence, the electrical signal is converted into a chemical signal at the axonal end. Since these chemicals are absent at the dendrite end of the neuron the electrical signal, cannot be converted into chemical signal.
Question : Explain the reflex action by means of reflex arc with diagram.
Answer : In man and other vertebrate animals, there are two types of actions viz. voluntary and involuntary actions. The actions carried out and regulated by brain are voluntary actions. The actions carried out without direct concern of brain are involuntary actions. The involuntary actions are conducted by spinal cord and are known as reflex actions.
Reflex arc: For a reflex action, the path taken by a stimulus from some reception to one or more effectors is known as reflex arc. Once the sensory organ is excited by some stimuli, the message is carried by the sensory nerves to the spinal cord. From the spinal cord the directions carried by the motor nerve fibres to one or more effector organs. The whole action is completed instantaneously. Some of the examples of reflex actions are blinking of eyes, sneezing, coughing in response to foreign particle that has entered in eye, nose, the throat respectively.
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