Explanation

To arrange the groups in increasing order of species richness (i.e., from fewest to most species), let's look at general estimates of known species:

• Mammals – ~6,400 species
• Reptiles – ~11,000 species
• Fishes – ~34,000 species
• Insects – Over 1 million described species (possibly several million undiscovered)

Explanation

Explanation

The invertebrate that has a water vascular system is an echinoderm

Specifically starfish, sea urchins, sea cucumbers, brittle stars, and feather stars.

This unique system is a defining characteristic of the phylum Echinodermata. 

Explanation

 In Pakistan, mammals have the highest number of endangered species among vertebrates, followed by birds and reptiles. 

The wildlife of Pakistan comprises a diverse flora and fauna in a wide range of habitats from sea level to high elevation areas in the mountains, including

195 species of mammals (including 13 subspecies),

Endemic Species: 6

Number of orders: 10

668 bird species

More than 5000 species of Invertebrates

Explanation

The animal that uses echolocation for movement is the bat. 

Bats use high-frequency sound waves to navigate

And find food in the dark by emitting sounds

And then listening to the echoes that bounce back off objects. 

Explanation

 Bilateral symmetry is crucial for an active lifestyle as it allows for efficient movement and better sensory perception.

Organisms with bilateral symmetry, such as humans and most animals, have a streamlined body plan that enhances coordination, directional movement, and faster responses to environmental stimuli.

Explanation

Explanation

The data in a "Red Data Book" (or Red List) is indeed related to endangered and threatened species,

Including both plants and animals, and is maintained by the International Union for Conservation of Nature (IUCN). 

Explanation

The Line Transect Method is a survey technique where an observer follows a fixed pathway (transect) and records bird sightings along the way.

This method is useful for estimating bird populations, species distribution, and habitat preferences.

Explanation

 The hormone that is not secreted by the anterior pituitary gland is Oxytocin. 

Oxytocin is secreted by the posterior pituitary gland, while the anterior pituitary secretes hormones

Like growth hormone, follicle-stimulating hormone, and adrenocorticotropic hormone