Biology Quiz: Plant Physiology & Human Digestion

Study Notes

Plant Physiology and Biology

Tiny pores on leaves are known as stomata, which allow gas exchange for photosynthesis.
Chlorophyll is the pigment that enables plants to synthesize food from sunlight.
Green plants are referred to as autotrophs because they synthesize their own food.

Digestion and Body Temperature

Fat is completely digested in the small intestine, where emulsification and enzyme action occur.
Normal human body temperature is maintained around 37°C (98.6°F), crucial for metabolic processes.

Pain from Insect Stings

The sharp pain from the sting of ants or bees is caused by formic acid, a component of their venom.

Chemical and Physical Changes

Rusting of iron is an example of a chemical change, while drying of clothes represents a physical change.

Fill in the Blanks

Adult humans have 32 teeth in each jaw.
Diaphragm is a sheet of muscle present below the lungs that aids in breathing.
Radiation is a method of heat transfer that does not require a medium.

Short Answer Topics

Role of chlorophyll in photosynthesis: It absorbs light energy, primarily in the blue and red wavelengths, enabling the conversion of carbon dioxide and water into glucose and oxygen.
Assimilation: It refers to the process by which living organisms incorporate nutrients from food into their cells for growth and repair.
Conductors: Materials that allow the flow of electrical current; examples include copper and aluminum.
Indicators: Substances used to determine pH; natural indicators include litmus, turmeric, and synthetic indicators like phenolphthalein.
Crystallization: A process of formation of solid crystals from a homogeneous solution as it cools or evaporates.

Long Answer Topics

Factors affecting photosynthesis: Light intensity, carbon dioxide concentration, temperature, and water availability.
Instant energy from glucose: Glucose is a simple sugar that can be quickly metabolized to release energy for immediate use.
Painting outer walls white: Reflects sunlight, keeping houses cooler in hot climates by reducing heat absorption.
Natural indicators: Substances derived from plants that change color in response to pH, such as red cabbage and beetroot.
Preventing rust with paint: Paint acts as a barrier to moisture and oxygen, preventing the iron from oxidizing and rusting.
Difference between breathing and respiration: Breathing is the physical process of inhaling and exhaling air, whereas respiration is a biochemical process that converts glucose and oxygen into energy.

Description

Test your knowledge on plant physiology, human digestion, and chemical changes with this comprehensive quiz. Cover topics such as stomata, chlorophyll, and body temperature regulation. Dive into the fascinating world of biology!