NCERT Science Class 10 Chapter 7 Quiz: Control and Coordination in Animals and Plants

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12 Questions

What role do nerves play in animals with regards to control and coordination?

Nerves play a crucial role in controlling movements and sensing changes in the environment.

How do hormones function in plants in relation to control and coordination?

Hormones in plants regulate growth, help them respond to environmental stimuli, and prepare them for reproduction.

What is the role of enzymes in the process of control and coordination in living organisms?

Enzymes break down complex molecules into simpler ones to aid in digestion and nutrient absorption.

How are nutrients transported to different parts of the body in living organisms?

Nutrients are carried by blood to different parts of the body through capillaries.

Explain the role of photoreceptors in plants' response to light.

Photoreceptors are special proteins responsible for responding to light in plant cells.

What happens to chemicals inside plant cells when exposed to sunlight?

Chemicals inside plant cells change shape rapidly in response to light exposure.

Abscisic acid causes leaf wilting by promoting growth.

False

Auxins promote growth in a plant's shoot apical meristem.

True

Gibberellins inhibit stem elongation in plants.

False

Animal systems have a nervous system similar to plants.

False

Peptide growth factors are responsible for controlling growth patterns in animals.

True

Setting up conditions to observe differences between growth responses is essential in designing experiments.

True

Study Notes

NCERT Science Class 10 Chapter 7: Control and Coordination in Animals and Plants

The chapter 'Control and Coordination in Animals and Plants' from your NCERT textbook discusses how living organisms control their activities and coordinate them effectively to ensure continued survival. This coordination is essential because all life forms must adapt to changes around them and maintain homeostasis within themselves.

In animals, nerves play a crucial role in controlling movements and sensing changes in environment. For example, when you touch something hot, a nerve sends signals to various parts of the body to make it react quickly by pulling back hand from heat source. In plants, hormones act like nervous system. They regulate growth, help plant respond to environmental stimuli, and also prepare plants to reproduce.

As food engages with digestive cells, enzymes secreted by these cells break down the complex molecules into simpler ones. Blood carries nutrients made during this process to different parts of the body. Nutrients in blood travel through capillaries near each cell until they come across a cell that needs those nutrients.

In response to light, some chemicals inside plant cells change shape rapidly. These chemicals get activated immediately after exposure to sunlight. Special proteins called photoreceptors are responsible for responding to light. When light enters leaves, special pigments absorb energy from sun rays and store that energy temporarily. Then, the stored energy gets released slowly over time so that leaf can grow normally even though there isn't much direct sunshine available.

Coordinating all these activities requires constant communication between cells throughout the entire body. Cells communicate using chemical messengers. If one part of a body heats up too much, information will be sent to another part telling it to cool off. Communication happens fast enough for us to feel comfortable while we are warm and cold.

So, control and coordination are necessary processes which allow living beings to live longer, function better, and survive better. It enables efficient response to changing conditions around them. Without proper control mechanisms, life would cease to exist.

Test your knowledge on how living organisms control their activities and coordinate them effectively to ensure continued survival. Explore the role of nerves in animals and hormones in plants, as well as the importance of communication between cells for efficient responses to changing conditions.

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