Tag: movements in plants

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Multiple choice biology life processes in living organism movements in plants coordination in plants tropic and nastic movements in plants

Locomotion is a very important feature in animals.Considering the frequent need for locomotion in animals ,an animals would obtain the greatest benefit from storing its energy as 

  1. Proteins

  2. minerals

  3. Carbohydrates

  4. Fats
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fats store more than twice the amount of energy per unit mass compared to carbohydrates and proteins, making them the most lightweight and efficient form of long-term energy storage for mobile animals. Storing energy as glycogen or protein would add excessive weight.

Multiple choice biology life processes in living organism movements in plants coordination in plants tropic and nastic movements in plants

Which foramen is paired in mammalian brain ?

  1. Foramen of Monro

  2. Foramen of Magendie

  3. Interventricular foramen

  4. Foramen of Luschka
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Foramen of Luschka (lateral apertures) is a paired structure in the brain that allows cerebrospinal fluid to exit the fourth ventricle. The other listed foramina are singular structures.

Multiple choice biology life processes in living organism movements in plants coordination in plants tropic and nastic movements in plants

Which cranial nerve is present in Rabbit but absent in frog?

  1. Glossopharyngeal

  2. Hypoglossal

  3. Olfactory

  4. Optic
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The hypoglossal nerve (XII) is a cranial nerve present in mammals, including rabbits, but it is absent in amphibians like frogs. In frogs, the tongue muscles are innervated by spinal nerves rather than a dedicated cranial nerve.

Multiple choice biology control and co-ordination in plants and animals movements in plants coordination in plants tropic and nastic movements in plants

The term synergistic action of hormones refers to

  1. When two hormones act together but bring about opposite effects.

  2. When two hormones act together and contribute to the same function.

  3. When one hormone affects more than one

  4. When many hormones bring about any one function.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Growth, differentiation and development processes of plants are found to be regulated by two or more phytohormones acting synergistically or antagonistically, e.g. cell division is promoted by both auxins and cytokinins acting synergistically. Cell growth is controlled by auxins, gibberellins, and cytokinins. Morphogenesis is an interplay of auxins and cytokinins, where both must be present in some minimum concentration.
So the correct answer is 'When two hormones act together and contribute to the same function.'.
Multiple choice biology control and co-ordination in plants and animals movements in plants coordination in plants tropic and nastic movements in plants

Movement caused by injury is

  1. Traumotropism

  2. Rheotropism

  3. Traumonasty

  4. Rheonasty
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The movement of plant part as a result of injury is called as traumatropism. It this, due to injury or wound, plant changes its orientation. Growth of plant part in response to the current of water is called as rheotropism. Folding of leaves in response to injury is called as traumonasty. 

Thus, the correct answer is option A.

Multiple choice biology life processes: control and coordination movements in plants coordination in plants tropic and nastic movements in plants

The sun loving plants are referred to as

  1. Halophytes

  2. Heliophytes

  3. Heterotrophs

  4. Sciophytes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Halophytes are salt lovers and grow in marshy areas and other places with high salt concentrations. 

Heterotrophs are the organism that cannot manufacture their own food and depend on other living or dead organisms for their nutrition, example fungi and animals. 
Plants are autotrophs and can manufacture their own food through the process of photosynthesis. 
Plants growing in shade are called sciophytes or shade lovers. Plants growing in sun are called as heliophytes or sun lovers. Sciophytes have comparatively darker leaves and have higher amount of chlorophyll to capture scarce light. Heliophytes have lesser amount of chlorophyll as compared to sciophytes as they easily get enough light for the purpose of photosynthesis.

Multiple choice coordination - the linking system movements in plants coordination in plants tropic and nastic movements in plants

Bending of stem towards light is

  1. Photoperiodism

  2. Heliotropism

  3. Photonasty

  4. Hydrotropism
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Heliotropism is a growth movement or bending of stem in the direction of the light. It is also called as solar tracking. Photoperiodism is the phenomenon in which various physiological reactions like flowering response to the relative length of dark or light periods. Photonasty is nastic movement of plant towards sunlight. Hydrotropism is a growth movement of plant part in response to water.

Thus, the correct answer is option B. 

Multiple choice biology life processes: control and coordination movements in plants coordination in plants tropic and nastic movements in plants

Bending of growing shoot towards sunlight is called

  1. Heliotropism

  2. Hydrotropism

  3. Photonasty

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Heliotropism- The growth of plants or plants parts esp flowers in response to the stimulus or sunlight, so that they turn to face the sun. It enhances the photosynthesis process and increases growth rates.

So, the correct answer is 'Heliotropism'.