Science [1 Mark Questions]

Green Plant.

1. Carnivores.
2. Herbivores.
3. Omnivores.

Peristaltic movement.

Urethra is a tube which passes out the urine from the body collected in the urinary bladder.

Absorption of digested foods occurs mainly in the small intestine due to the presence of a large number of finger like projections called villi.

Stomata.

1. The largest artery in the human body is ‘Aorta’.
2. The largest vein in the human body is ‘Vena Cava’.

Villi.

1. Small Intestine.
2. Large Intestine.

Chemical Energy.

Salivary amylase is present in human saliva. It digests starch. Which of the organs perform the following functions in humans?

1. Absorption of food.
2. Absorption of water.

Ingestion, digestion, absorption, assimilation, egestion.

1. Phloem.
2. Xylem.

Ethanol.

Paramecium.

The evaporation of water from the leaves of the plants is called transpiration.

Oesophagus.

Parasitic mode of nutrition.

Stomata in the leaves and lenticels in the stems are two parts through which a plant releases its gaseous waste products into the air.

Anus.

Oxygen.

Diffusion.

Haemoglobin.

The contraction and expansion movements of oesophagus also called peristaltic movements pushes the food down into the elementary canal.

Ethanol and carbon-dioxide.

The liquid part of the blood is called plasma. Platelets help in the coagulation of blood in a cut or wound.

The basic functions performed by living organisms to maintain their life on this earth are called life processes. The basic life processes common to all living organisms are?
Nutrition and Respiration; Transport and Excretion; Control and Coordination; Growth; Movement and Reproduction.

Carbon-dioxide and urea.

Gills.

The carbon-dioxide gas enters the leaves of the plants through the stomata present on their surface.

Carbon-dioxide and water.

Transport of food.

Prawns and mussels.

Xylem and phloem.

The transport of food from the leaves to the other parts of the plant is called translocation.

Carbon-dioxide.

Enzymes help in the breaking down of complex organic food materials into simpler forms.

Guard cells.

There are three types of blood vessels – arteries, veins and capillaries.

Lymph.

The function of glomerulus is to filter the blood passing through it and initiate urine formation.

Heterotrophs.

The criteria to decide whether something is alive is the movement.