Explanation

The alkaline mucus secreted by the Cowper's glands also plays an important role in neutralizing the acidic nature in the urine.

Explanation

Bacteria that lack flagella are called atrichous.

Explanation

The embryological stages of all vertebrates show similarities in anatomical features, reflecting a common evolutionary origin.

Explanation

The wings of birds and flying lizards are examples of convergent evolution, where different species evolve similar traits independently, often due to similar environmental pressures.

Explanation

The biogenetic law, also known as recapitulation theory, was proposed by Ernst Haeckel.

It suggests that the development of an organism (ontogeny) mirrors the evolutionary development of the species (phylogeny).

Explanation

Trilobites are an extinct group of marine arthropods that lived during the Paleozoic Era.

They are one of the earliest known groups of arthropods.

Explanation

The Paleozoic Era was a time of significant diversification of life, marked by the Cambrian Explosion, during which many major groups of animals first appeared in the fossil record.

Explanation

Parasitism is a type of relationship where one organism (the parasite) lives on or inside another organism (the host)

And benefits at the expense of the host, who is harmed by the interaction. 

Explanation

It is estimated that about 99.9% of all species that have ever existed on Earth are now extinct.

This figure underscores the vast extent of extinction events throughout:

• Earth's history
• reflects the dynamic 
• often unstable nature of life on the planet.

The remaining 0.1% of species are the ones that are still extant today.

Explanation

Adaptive radiation is the process by which a single ancestral species rapidly diversify into a wide variety of forms to adapt to different environments or ecological niches.

This typically occurs when a species colonizes a new habitat or experiences a significant environmental change.