Biology Quiz for 10th Class

A hummingbird is best suited for pollinating flowers with nectar, due to its small size and long beak.

Body temperature is a key difference between birds and mammals. Birds are warm-blooded (endothermic), while mammals are also warm-blooded.

Plant and animal cells share some parts. Two parts found in both are the nucleus and the cytoplasm.

Plants in hot, dry areas often have swollen stems for water storage and short roots to absorb water close to the surface. They often have narrow leaves or thorns to reduce water loss.

Food and water are transported upwards in the plant from the roots to the growing parts.

Small intestine absorbs nutrients, while the large intestine absorbs water.

Activities like burning fossil fuels lead to an increase in greenhouse gases and a rise in Earth's temperature. Plant trees are considered to help with lowering the temperatures.

Plants grow from seeds, taking in nutrients and water from the soil and air.

An increase in carbon dioxide can lead to an increase in plant growth, causing more carbon dioxide to be absorbed. It can also lead to increased temperatures, increasing the rate of photosynthesis.

A non-flowering plant can be identified by its lack of bright-colored flowers and its reliance on wind for pollination.

Leaves lose more water through stomata on the lower surface than the upper surface, suggesting there are more stomata on the lower surface.

When a balloon is cooled in a refrigerator, heat flows from the air inside the balloon to the colder environment of the refrigerator.

When a ball is thrown upwards, it experiences a decrease in speed as it goes from point P to Q. Upon reaching point Q, the ball momentarily stops before falling back down to point P.

Plants absorb carbon dioxide during photosynthesis, leading to a decrease in the amount of carbon dioxide in the air.

Some plants, like grasses, rely on wind to carry pollen from one plant to another.

Stomata are tiny openings on leaves that allow for gas exchange but also lead to water loss through transpiration.

A control setup in an experiment designed to test a variable (oxygen in this case) involves maintaining all other factors constant and using a setup without the variable of interest (oxygen, here) for comparison. This allows for a fair comparison and helps to determine if the change observed is due to the variable under investigation or some other factor.

The part of a flower that is crucial for seed production is the part responsible for attracting pollinators and for creating seeds.

The best way to house a grasshopper is the method offering the most natural environment, mimicking its natural habitat.

By analyzing a graph of population values over time, the introduction time of a new organism can be determined by finding the point where a change in population trend occurs (an incline or spike).

If removing a specific part of a flower prevents seed production, the removed part was crucial for pollination or fertilization.

The stages of a plant's life, process X (germination) is the growth from a seed and Y (fertilization) is plant reproduction.

Identifying a setup/control without the variable being tested. It's like a comparison setup to show the effect of the variable being tested.

A plant's activity (photosynthesis, respiration, etc.) affects the carbon dioxide concentration, so the amount likely decreases due to photosynthesis in the presence of light. The effect depends on the activity or presence of a light source.

A circuit where the current has multiple paths to flow, allowing each component to function independently.

A circuit where the current flows through all components in a single path, meaning a break in the circuit stops the flow of current to all components.

When bulbs are connected in parallel, each bulb has its own separate path for the current, so the brightness of one bulb doesn't affect the brightness of the other.

The maximum weight a string can hold before breaking is a measure of its strength.

By observing which pins on a board light the bulb when connected to wires, one can deduce how the metal pins are connected in the circuit.

A circuit with a switch allows you to interrupt or complete the flow of current, turning components on or off selectively.

A circuit where the path for the current is broken, preventing the flow of current.

A circuit where the path for the current is complete, allowing the flow of current.

As the ball moves upwards from point P to point Q, it slows down, converting its kinetic energy into potential energy. Therefore, the potential energy increases.

As the ball falls from its highest point Q back down to point P, it speeds up, converting its potential energy back into kinetic energy. Therefore, the kinetic energy increases.

Wrapping the beaker in a wet cloth is the most effective method to cool the boiling water quickly. The water in the cloth absorbs heat from the beaker, leading to faster cooling.

If bulb B is blown, the circuit will still have a complete path through bulbs C, D, E, and F. Therefore, 4 bulbs would still be lit.

The graph should show a gradual increase in temperature as the ice melts, a plateau at 0°C while the ice fully melts, a continued increase in temperature until reaching 100°C, a plateau at 100°C while the water boils, and then a decrease in temperature after the Bunsen burner is turned off.

Mei Ling's experiment investigates the effect of the distance between the lamp and the cardboard on the temperature recorded. This means the distance (x) is the independent variable.

Condensation is the process where water vapor in the air transforms into liquid water. It happens when water vapor cools down and loses energy.

Water droplets form on the outside of a cup due to condensation, where water vapor in the air cools and changes to liquid. Different materials conduct heat differently causing condensation in different locations.

Frictional force acts between surfaces in contact, opposing motion. It exists when an object is resting, being moved, or sliding.

A roller coaster's total energy (potential and kinetic) changes throughout the ride. Potential energy is highest at the highest point, and kinetic energy is highest at the fastest points.

The length of a shadow depends on the distance from the light source and the angle of the light rays. Further away from the source, the shadow gets longer.

Justin's walking speed is different between P and Q, and Q and R. Speed is distance over time, so a longer distance in the same amount of time means higher speed.

An electrical circuit is a complete path for electricity to flow. The bulbs in the circuit will light if the circuit is complete and there is a power source (battery).

The total energy of the roller coaster at different points on the track is not always the same. At the highest point, the potential energy is highest, and at the lowest point, the kinetic energy is highest.

The length of Justin's shadow changes as he walks away from the lamp. The time it takes to cover a certain distance also influences the shadow length.