Explanation

The symbiotic relationship between algae and fungi on bare rocks, forming a composite organism, is called a lichen. 

Lichens are not single organisms but rather a composite of two: A fungus and an algae or cyanobacteria. 

Explanation

Respiration,

specifically cellular respiration, is the process where cells use oxygen to break down glucose (a type of sugar derived from food) and release energy in the form of ATP (adenosine triphosphate), which is the energy currency of the cell. 

Explanation

Cud-chewing animals like cattle, deer, and sheep are known as Ruminants

Ruminants: are herbivorous mammals, like cows, sheep, and goats, that have a specialized digestive system allowing them to process plant matter efficiently by regurgitating and chewing food, a process called rumination. 

Herbivores: are animals that eat primarily plants. 

Carnivores: are animals that eat primarily meat. 

Omnivores: are animals that eat both plants and animals

Explanation

 A Geiger counter is a device used to detect and measure ionizing radiation, commonly used to monitor levels of radioactivity in an environment.

Explanation

 Strict Natural Reserves are areas set aside for the protection of biodiversity and natural geological features, with very strict regulations prohibiting human activities to ensure minimal disturbance.

Explanation

Xerosere is a type of succession that occurs in dry or desert areas, starting from bare land

It involves a gradual, staged transition from bare, xeric conditions to a stable, mature, and moisture-retaining climax forest community

Explanation

 Xerophytes:

The dominant vegetation types are plants that are adapted to arid environments and can survive with minimal rainfall. 

Common Genera:

Grasses: Lasiurus, Cenchrus, Sporobolus, Cymbopogon, and Panicum. 

Shrubs: Suaeda, Capparis, Calligonum, Leptadenia, Salsola & Haloxylon. 

Trees: Prosopis, Tamarix, Zizyphus, and Acacia. 

Specific Plant Species:

Lana (Haloxylon salicornicum) 

Karir (Capparis aphylla) 

Phog (Calligonum polygonoides) 

Explanation

Acoustic signals can be both easy and difficult to detect, depending on several factors:

Easy to detect – In open environments with minimal noise, acoustic signals (such as animal calls or sonar) travel efficiently and can be recognized easily.

Difficult to detect – In noisy or complex environments (such as dense forests or urban areas), background noise can interfere with signal clarity, making detection difficult.

Explanation

 Tactile signals:

Involve the transmission of information through physical touch or contact. 

Examples of tactile signals:

Mating: Tactile signals play a role in courtship and mating rituals, like honeybee foraging through touch. 

Explanation

 The house sparrow ( Passer domesticus) is a very common bird species found in Pakistan 

One of about 25 species in the genus Passer, the house sparrow is native to most of Europe, the Mediterranean Basin, and a large part of Asia