Name the mechanism by which wooden doors usually swell up during rainy season.

Q: Show diagrammatically how heavy metals enter into the echo system.

A: Heavy metal pollution and pollution of the environment is a severe hazard to the environment. They…

Q: What are the respiratory openings found on the stem of woody plants.

A: A woody plant is a plant that produces wood as its structural tissue. Woody plants are usually…

Q: Light compensation zone refers to: A) where light is available in plenty B) where light is maximum…

A: Answer is C.) beyond which light does not penetrate

Q: Why in ascent of sap, sap move upwards against the force of gravity.

A: There are 2 vascular tissues in plants- xylem and phloem. Xylem is responsible for transportation of…

Q: (a) Define the following terms i. Transpiration ii. Osmosis iii. Capillary action iv. Surface…

A: i. Transpiration: Transpiration can be defined as the process in which water is removed from the…

Q: Explain why there is the disappearance of distance AM broadcast band Stations in the daytime

A: AM : Amplitude modulation. Short waves can circle the globe. AM broadcast band stations transmit…

Q: What will happen to BOD, when huge amount of sewage is dumped into river?

A: BIOCHEMICAL OXYGEN DEMAND (BOD) is the amount of dissolved oxygen needed  by aerobic biological…

Q: What are the lights that we get in the sun

A: Sun is the source of energy on earth. It provides light and energy to all living beings on earth. It…

Q: Explain how water movement affects the flow of nutrients

A: Nutrients and water that flows in the plant system through the xylem and phloem. Xylem helps in…

Q: Why micturation is more frequent in winters as compared to summers?

A: Micturation is the medical term for urination, a process of urine released from the urethra of the…

Q: Which form of precipitation is most likely hitting the ground? A. rain O B. hail C. snow O D. sleet

A: The falling of water from the sky occurs in different forms, this is known as Precipitation. These…

Q: State the relationship between air spaces and the size of the particles of soil.

A: Given: To determine the relationship between air spaces and the size of the particles of soil.

Q: Explain why humans typically feel more uncomfortable on hot and humid days than on hot and dry days.

A: Humidity is the presence of water vapor in the air.Water vapor is the gaseous state of water and…

Q: When it is summer in the United States

A: There are 4 seasons in United States  Summer Spring Winter Fall

Q: Ladder Lane 1 Lane 2 Lane 3 Lane 4 Lane 5 Lane 6 Lane 7

A: SDS-PAGE Sodium Do-Decyl Sulphate- Polyacrylamide Gel Electrophoresis It is a molecular technique…

Q: Explain why gardeners may add a liquid feed containing nitrogen and magnesium ions to the water for…

A: Plants require mineral ions for healthy growth and yield. These mineral ions are dissolved in the…

Q: Give reason why a closed can containing dried seeds bursts open, if some water enters it…

A: Imbibition is a type of diffusion in which water is adsorbed by the solids-colloids and results in…

Q: Which structure provides temporary storage of food , water and waste products ?

A: A cell is made up of several organelles that function together for the maintenance of the overall…

Q: Write detail note on types of irrigation

A: Water is primarily irrigated; irrigated water is needed for growing the crops this planet survives…

Q: Why there is slow rate of decomposition of fallen logs in nature?

A: On basis of nutrition organism can be broadly classified as autotrophs and heterotrophs. Autotrophs…

Q: Due to prolonged contact with any of the polluting gases, it may cause loss of sense of smell and…

A: Air polluting gases usually enters the human body through the nose, putting it at risk of injury…

Q: Why it is very refreshing to stay in an area with a lot of plants during very hot Of the day?

A: Introduction  Like all living organisms, plants also need continuous water supply in order to…

Q: Which of the following represents the movement of gases through the open stomata of a leaf during…

A: Plants are living organisms that contain a cell wall made up of cellulose. They have green pigments…

Q: State dangerous consequences of green house effect.

A: The greenhouse effect is helpful as it regulates the temperature of the Earth, the consequence of…

Q: Name the water harvesting method in madhya pradesh and uttar pradesh.

A: Water harvesting means capturing the rain water streams and store it for the later use, rather than…

Q: Why are the stone canal and madreporite hard while the rest of the water vascular system is soft?

A: Echinoderms like sea stars and sea urchins utilise water vascular system which is a hydraulic system…

Q: Explain what relative humidity is and provide 3 factors that cause it to vary in different areas.

A: Introduction  Humidity refers to the amount of water vapour in the air. The gaseous condition of…

Q: By which gases acid rains are produced?

A: Water is a transparent, inorganic, odorless, tasteless, and nearly colorless chemical substance. It…

Q: Why do limestone buildings show signs of damage?

A: Environmental pollution is very serious thing which is caused by humans. In the we are damaging our…

Q: Write critical notes on the following Eutrophication,

A: As we know, organisms are capable of maintaining their internal environment steady via process…

Q: Why is it difficult to catch a fly?

A: Flys are dipterans.

Q: Identify five stimuli that control the opening and closing of stomata.

A: Stomata are the tiny structures present in the epidermis of the plant leaves and in the stem of…

Q: Which one of the following is not caused due to the PV power plants? a. Land pollution b. Battery…

A: The plants that use a large area of PV (photovoltaic) cells made from silicon alloys to convert the…

Q: Why wooden doors and windows swell up during the rainy season.

A: Introduction Diffusion is the process of transport of water molecules form their high concentration…

Q: Explain the role of light and carbon dioxide on the opening and closing of stomata

A: The paired guard cells present in plants  causes the stomata to open when they take up water and…

Q: To explain: Why professional gardeners soak their seeds in hydrogen peroxide before planting.

A: Seeds inside each fruit are designed to germinate and grow into a new plant on their own, a process…

Q: Which water loss that can be prevented by a Contour walls b Planting wind breaks

A: Water is one of the most significant limitations to agricultural production since it directly…

Q: Name the water harvesting method in maharashtra.

A: Water harvesting means capturing the rain water streams and store it for the later use, rather than…

Q: A forest rich in eucalyptus trees grows well after fires that clear the competing undergrowth,…

A: Ecology is the study of interaction of organisms with one another and with the environment. Ecology…

Q: What are the strengths and weaknesses of each type of material used for drapes?

A: Surgical draping is the procedure performed to create a sterile field during surgery. It is one of…

Q: Explain how the rate of transpiration is affected on (i) a windy day (ii) a foggy day.

A: Process of water movement through the plant and its evaporation from aerial parts of the plant…

Q: What do you think will happen to the amount of Carbon Dioxide in the bo when the leaves are in the…

A: Answer. Photosynthesis is a process by which plants (or any photosynthetic organism) convert light…

Q: Depending on the environment the plant is in, more or less gas may be produced. Suggest a method for…

A: Photosynthesis is the process of conversion of carbon dioxide and water into complex compounds like…

Environmental effects

Environmental effect is the beneficial or adverse impact of human products, services, or activities on the environment. For example, the release of volatile organic compounds negatively affects the environment and causes smog formation. On the other hand, collecting litter and putting it in bins positively affects the environment.