Define fruit.
Ans: A fruit is the mature ovary of a flowering plant that typically contains seeds. It develops from the fertilized flower and serves as a means of seed dispersal. Fruits are often sweet or fleshy, but they can also be dry, depending on the type of plant
What is the function of receptors in our body? Think of situations where receptors do not work properly, what problems are likely to arise?
Ans: Receptors in our body are specialized cells or structures that detect and respond to stimuli from the environment or within the body. They play a crucial role in sensory perception and relay information to the nervous system.
When receptors do not work properly, it can lead to various problems depending on the specific receptors affected. Here are a few examples:
A. Loss of vision: Malfunctioning of the photoreceptors in the eyes can lead to visual impairments or blindness.
B. Hearing loss: Dysfunction of the auditory receptors in the inner ear can result in hearing loss or deafness.
C. Reduced sense of touch: Impaired receptors in the skin can diminish the ability to sense temperature, pressure, or pain.
D. Altered taste and smell perception: Dysfunction of taste buds or olfactory receptors can affect the ability to taste or smell properly.
E. Balance and spatial orientation issues: Problems with receptors in the inner ear responsible for detecting motion and maintaining balance can cause dizziness, vertigo, or difficulties with coordination.
In general, when receptors do not work properly, it can disrupt the transmission of sensory information to the brain, leading to sensory deficits, impaired perception, or difficulties in coordinating responses to the environment.
Why is it advisable to use iodised salt in our diet?
Ans: It is advisable to use iodized salt in our diet because iodine is an essential micronutrient required for the synthesis of thyroid hormones. The thyroid gland uses iodine to produce hormones such as thyroxine (T4) and triiodothyronine (T3), which are crucial for regulating metabolism, growth, and development. Iodine deficiency can lead to various health problems, including goitre (enlargement of the thyroid gland), hypothyroidism, and impaired mental and physical development, especially in children. By using iodized salt, which contains a controlled amount of iodine, we can ensure an adequate intake of this essential nutrient and prevent iodine deficiency disorders.
How many types of movements are shown by plants? Explain with examples.
Ans: Plants exhibit various types of movements, including:
Phototropism: The movement of a plant in response to light. For example, the growth of a plant towards a light source is positive phototropism, while growing away from light is negative phototropism.
Gravitropism: The response of a plant to gravity. Roots show positive gravitropism by growing towards gravity, while stems show negative gravitropism by growing against gravity.
Thigmotropism: The response of a plant to touch or physical contact with an object. Examples include the coiling of tendrils around support structures or the curling of tendrils around a trellis.
Hydrotropism: The movement of a plant in response to water. Roots exhibit positive hydrotropism by growing towards a water source.
Define geotropism.
Ans: Geotropism (also known as gravitropism) is the growth or movement of a plant part in response to gravity, where the roots grow downwards (positive geotropism) and the shoots grow upwards (negative geotropism).
Explain the process of nutrition in Amoeba.
Ans: In Amoeba, nutrition occurs through a process called phagocytosis. Amoeba is a unicellular organism that engulfs its food using pseudopodia, which are temporary extensions of its cell membrane and cytoplasm.
The process of nutrition in Amoeba involves the following steps:
Detection: Amoeba senses the presence of food particles in its environment through chemical signals.
Engulfment: Once a food particle, such as a microscopic organism or organic matter, is detected, Amoeba extends pseudopodia around it, forming a food vacuole. The food vacuole is internalized and separated from the external environment.
Digestion: Enzymes, such as proteases and lipases, are secreted into the food vacuole to break down the ingested food into simpler molecules.
Absorption: The digested nutrients, including sugars, amino acids, and fatty acids, are absorbed from the food vacuole into the cytoplasm of Amoeba.
Assimilation: The absorbed nutrients are utilized by Amoeba for energy production, growth, and maintenance of cellular functions.
Egestion: Undigested waste material is expelled from the cell through the process of exocytosis.
LIFE PROCESSES: Long Answer Type Question for Class 10th Chapter 10 JKBOSE/NCERT Read More »
Name the acid presents in the following:
(i) Tomato (ii) Vinegar (iii) Tamarind
Ans: The acids present in the following are:
(i)Tomato: Citric acid
(ii) Vinegar: Acetic acid
(iii) Tamarind: Tartaric acid
LIFE PROCESSES: Short Answer Type Question for Class 10th Chapter 10 JKBOSE/NCERT Read More »
Why do herbivores have longer, small intestines than carnivores?
Ans: Herbivores have longer, small intestines than carnivores due to the nature of their diet. Herbivores consume plant material, which is often more difficult to digest compared to the protein-rich diet of carnivores. Plant material contains complex carbohydrates, such as cellulose, which requires more time and specialized enzymes for breakdown. The longer small intestines in herbivores provide a larger surface area and allow for a longer transit time, enhancing the digestion and absorption of plant-based nutrients.
LIFE PROCESSES: Short Answer Type Question for Class 10th Chapter 10 JKBOSE/NCERT Read More »
Name the cartilaginous flap which closes the glottis to check the entry of food into it during swallowing
Ans: The cartilaginous flap that closes the glottis to prevent the entry of food during swallowing is called the epiglottis. The epiglottis covers the opening of the windpipe (trachea) to ensure that food goes down the esophagus and into the stomach, rather than entering the respiratory system.
LIFE PROCESSES: Very Short Answer Type Question for Class 10th Chapter 10 JKBOSE/NCERT Read More »
The blood has ………. cells which plug the leakage in the vessels by helping to clot the blood at the point of injury.
Ans: Platelets (thrombocytes)
LIFE PROCESSES: Multiple Type Question for Class 10th Chapter 10 JKBOSE/NCERT Read More »
