Explanation

Explanation

 The MN blood group system in humans is an example of co-dominance, where both alleles (M and N) are expressed equally in the heterozygote. 

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

The pectoral and pelvic fins are the paired fins in fishes. 

Paired fins:

Fish have two sets of paired fins: pectoral and pelvic. 

Pectoral fins:

These are located on the sides of the fish, and they are used for steering and maneuvering. 

Pelvic fins:

These are located on the ventral (belly) side of the fish, and they help with balance and stability. 

Unpaired fins:

The dorsal, anal and caudal fins are unpaired and situated along the midline of the body. 

Explanation

 According to the United Nations, a person who changes their country of usual residence for at least one year (12 months) is considered an international migrant. 

Explanation

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

 Houbara bustards are hunted for both sport and their meat, which is believed to have aphrodisiac qualities. 

The International Union for Conservation of Nature (IUCN) has placed the Houbara bustard on its "red list" of threatened species, indicating a high risk of extinction. 

Estimates say there are between 50,000 and 100,000 Houbara bustards left. 

Explanation

Placoderms, Archeopteryx, and Therapsids are true fossils representing extinct organisms.

**Placoderms:** Ancient armored fish from the Devonian period, well-known for their fossilized remains.

**Archeopteryx:** A transitional fossil that shows characteristics of both dinosaurs and birds, marking a key step in avian evolution.

**Therapsids:** Synapsids from the Permian and Triassic periods, regarded as ancestors to mammals.

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.