Question 11 Mark
Give an example of a plant hormone that promotes growth.
Answer
View full question & answer→- An example of a plant hormone that promotes growth: Auxin.
Questions · Page 1 of 2
[1 Mark Questions]
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Test yourself on this topic
50 questions · timed · auto-graded
Question 21 Mark
Which of the following diagram is correct? Why?
Answer
View full question & answer→- Diagram $(a)$ is correct, because roots show positive geotropism and stem shown negative geotropism.
Question 31 Mark
A graph shows change after a lunch of a healthy individual whose diet is rich in sweets.
What you explain from it?
What you explain from it?
Answer
View full question & answer→- When the sugar level rises in blood, pancreas releases more insulin to regulate blood sugar level.
- As blood sugar level falls, insulin secretion is reduced by feedback mechanism.
Question 41 Mark
Identify $(a), (b), (c)$ and $(d)$ in the given figure. Give one name of the hormone secreted from each of any two of them.
Answer
View full question & answer→- $(a)$ Pineal gland-Melatonin hormone
- $(b)$ Pituitary gland-Growth hormone
- $(c)$ Thyroid gland-Thyroxine
- $(d)$ Thymus gland-Thymocine
Question 51 Mark
Label $(a), (b), (c)$ and $(d)$ in the given figure showing the pathway of thermal impulse.
Answer
View full question & answer→- $(a)$ Sensory neuron
- $(b)$ Relay neuron
- $(c)$ Motor neuron
- $(d)$ Effector $=$ muscle in skin
Question 61 Mark
Why is chemical signal required along with electrical impulses in higher animals?
Answer
View full question & answer→- In higher animals, electrical impulses bring immediate response to only those cells that are connected by nervous tissue while chemical signals reaching to each and every cells of body.
Question 71 Mark
Bony box : Brain….... : Spinal cord
Answer
View full question & answer→- Backbone (vertebral column)
Question 81 Mark
Give the scientific terms used to represent the Winding of tendril around a support.
Answer
View full question & answer→- Thigmotropism
Question 91 Mark
Give the scientific terms used to represent the Bending of roots towards water.
Answer
View full question & answer→- Hydrotropism
Question 101 Mark
Give the scientific terms used to represent the Growing of a pollen tube towards ovule
Answer
View full question & answer→- Chemotropism
Question 111 Mark
Give the scientific terms used to represent the Growing of roots towards the earth.
Answer
View full question & answer→- Geotropism
Question 121 Mark
Give the scientific terms used to represent the Bending of a shoot towards light.
Answer
View full question & answer→- Phototropism
Question 131 Mark
Identify me : I am controlling your daily activities such as walking, riding a bicycle, picking up object, etc.
Answer
View full question & answer→- Cerebellum
Question 141 Mark
Deficiency of growth hormone : ......... :: Deficiency of ......... : diabetes
Answer
View full question & answer→- Dwarfism, Insulin
Question 151 Mark
Which event is indicated in the diagram? Which hormone is responsible for it?
Answer
View full question & answer→- Positive phototropism in shoot is indicated in the diagram. Auxin is responsible for it.
Question 161 Mark
Movement dependent on growth: Tendrils of pea:: Movement independent of growth: ........
Answer
View full question & answer→- Drooping of leaves of chhui-mui
Question 171 Mark
Who am I? I am present in greater concentration areas of rapid cell division, such as in fruits and seeds.
Answer
View full question & answer→- Cytokinin
Question 181 Mark
State the correct sequence of impulse for spinal reflex.
Answer
View full question & answer→- Receptors in skin → sensory neuron → spinal cord → motor neuron → effector (muscles)
Question 191 Mark
Identify me: I am a hormone generally for an emergency, increases breathing rate but reduce blood flow to digestive system and skin.
Answer
View full question & answer→- Adrenaline
Question 201 Mark
Trace the sequence of events which Occur when a bright light is focused on your eyes?
Answer
constrict nerve brain /neurons
(neuron)
View full question & answer→- Stimulus (bright light) → photo receptors of eyes
constrict nerve brain /neurons
(neuron)
Question 211 Mark
Give the correct sequence of conduction of impulse.
Answer
View full question & answer→- Correct sequence of conduction of
- impulse: Dendrite → cell body → axon → nerve ending → synapse → dendrite
Question 221 Mark
What is full form of $CNS?$
Answer
View full question & answer→- $CNS $- Central Nervous System
Question 231 Mark
Explain the terms : Synapse
Answer
View full question & answer→- In the arrangement of two consecutive neurons the axon fibre endings of one neuron and the dendrite endings of the next neuron having a microscopic gap is called synapse.
Question 241 Mark
Explain the terms : Central Nervous System
Answer
View full question & answer→- A controlling and coordinating system of body which consists of brain and spinal cord is called central nervous system.
Question 251 Mark
Explain the terms : Receptors
Answer
View full question & answer→- The specialised structures that receive stimuli from external environment are called receptors.
Question 261 Mark
Explain the terms : Endocrine gland
Answer
View full question & answer→- The ductless glands that secret hormones are called endocrine gland.
Question 271 Mark
Explain the terms : Hormone
Answer
View full question & answer→- A chemical messenger, synthesised or secreted in extremely small quantities by endocrine glands. and poured directly in blood is called hormone.
Question 281 Mark
Explain the terms : Tropism
Answer
View full question & answer→- The growth related movement in the plant organs, which are induced as a response to directional stimulus is called tropism.
Question 291 Mark
Explain the terms : Coordination
Answer
View full question & answer→- Different organs of the body jointly function systematically against the stimuli and react to express proper response against the stimuli is called coordination.
Question 301 Mark
Explain the terms : Response
Answer
View full question & answer→- The reaction of living organisms against the stimulus induced by the change in the external environment is called response.
Question 311 Mark
Explain the terms : Stimulus
Answer
View full question & answer→- The changes, that take place in the external environment of living organisms (plants, animals, microorganisms, etc.) and induce definite types of reactions or responses, are called stimuli (singular-stimulus).
Question 321 Mark
State the secretory site and function of growth hormone releasing factor.
Answer
View full question & answer→- Growth hormone releasing factor: Secretory site: Hypothalamus.
- Function: Stimulates the pituitary gland to release growth hormone.
Question 331 Mark
Secretion of which hormone in males and in females is responsible for pubertal changes?
Answer
View full question & answer→- Secretion of testosterone in males and estrogen in females causes changes associated with puberty
Question 341 Mark
Why are hormones called chemical messengers?
Answer
View full question & answer→- Hormones are called chemical messengers because they carry information in the form of chemicals that regulate the biological processes of body.
Question 351 Mark
How do muscle cells change their shape?
Answer
View full question & answer→- Muscle cells have special proteins that change both their shape and arrangement in cells, so muscle cells change their shape.
Question 361 Mark
How do animal muscles move?
Answer
View full question & answer→- When a nerve impulse reaches the muscle, the muscle fibre can move due to stimulation.
Question 371 Mark
How do we know that we have eaten enough?
Answer
View full question & answer→- The sensation of feeling full is because of a centre that is associated with hunger, located in separate part of the fore-brain.
Question 381 Mark
Which separate areas are there in fore brain?
Answer
View full question & answer→- There are separate areas specialised for hearing, smell, sight, etc. in fore-brain.
Question 391 Mark
What are components of peripheral nervous system?
Answer
View full question & answer→- The peripheral nervous system consists of cranial nerves arising from brain and spinal nerves arising from the spinal cord.
Question 401 Mark
State any two examples of movement in order to protect ourselves.
Answer
View full question & answer→- When bright light is focussed on eyes, we constrict pupils, we pull our hand when we touch a hot object. These are the examples of movement in order to protect ourselves.
Question 411 Mark
By what is nervous tissue made-up of? What is its special ability?
Answer
View full question & answer→- The nervous tissue is made-up of an organised network of neurons. It is specialised for conducting information via electrical impulses.
Question 421 Mark
What is gustatory receptors? Where they located?
Answer
View full question & answer→- The receptors which detect taste are called gustatory receptors. They are located on the surface of tongue.
Question 431 Mark
What is an impulse?
Answer
View full question & answer→- Information that is transmitted through the nerves in form of electro-chemical signals are called impulse.
Question 441 Mark
What is the response of roots to gravity? What is this phenomenon known as?
Answer
View full question & answer→- A root give positive response to gravity, this phenomenon is called positive geotropism.
Question 451 Mark
Name the structural and functional unit of nervous system.
Answer
View full question & answer→- The neuron (nerve cell) is the structural and functional unit of nervous system.
Question 461 Mark
State one function of cerebellum.
Answer
View full question & answer→| Part | Function |
| Cerebellum | Coordination of the movement of the body and maintenance of body equilibrium. |
Question 471 Mark
Name the most important part of the human brain.
Answer
View full question & answer→- The most important part of the human brain is cerebrum which is the largest part of the brain.
Question 481 Mark
Name the three components of a nerve cell.
Answer
View full question & answer→- The three components of a nerve cell are a cyton, an axon and one or more dendrons.
Question 491 Mark
Name the two systems of control and coordination in higher animals.
Answer
View full question & answer→- The nervous system and the endocrine system are the two systems of control and coordination in higher animals.
Question 501 Mark
Where is auxin synthesised and where does it diffuses?
Answer
View full question & answer→- Auxin is synthesised at the shoot tip and it diffuses towards the side of the shoot which is in shade.