Biology MCQs

Notes:
Atropa belladonna, commonly known as belladonna or deadly nightshade, is a poisonous perennial herbaceous plant in the nightshade family Solanaceae. Allium cepa, Allium sativum and Asparagus officinalis are food plants.

Notes:
Pigeons have become useful bioindicators for lead pollution due to their widespread presence in cities and their ability to accumulate and retain heavy metals, including lead, in their tissues. Researchers have found that the feathers, blood, and tissues of pigeons can provide valuable information about the levels of lead exposure in the environment.

Lead pollution in cities can come from various sources, including lead-based paints, industrial emissions, and traffic-related sources. Pigeons, being urban birds, are exposed to these sources and can accumulate lead over time. By studying lead levels in pigeon populations, scientists can gain insights into the extent of lead pollution in a city and assess its potential risks to both wildlife and humans.

Notes:
The term Elasmobranches is a collective name for the sharks, skates and rays. Elasmobranches have a skeleton made of cartilage, no swim bladders and rough skin made up of small dermal dentils. Elasmobranches are renowned for their highly tuned senses.

Notes:
In biology, Zoophytes are organisms that exhibit characteristics of both animals and plants, although they are animals. They have plant-like appearance and perform photosynthesis, but belong to the animal kingdom. The term is commonly used to describe certain types of marine life, such as sea anemones and corals. These organisms are often static and have similar systems of feeding and growth as certain plant species. Zoophytes display an extraordinary demonstration of nature’s capacity for variation and adaptation.

Notes:
Potato and Brinjal have several common features and are thus included in the same genus Solanum. The scientific name of Potato is Solanum tuberosum and Brinjal is Solanum melongena.

Notes:
Birds evolved from theropod dinosaurs during the Jurassic around 165–150 million years ago. Birds aren’t just closely related to dinosaurs, they really are dinosaurs! This is what most people mean when they say that birds are reptiles, although technically according to the phylogenetic system mammals are also reptiles.

Notes:
In taxonomy, Homo sapiens is the only extant human species. The name is Latin for “wise man” and was introduced in 1758 by Carl Linnaeus. Humans are the only extant members of the subtribe Hominina.

Notes:
Tick, beg bug and louse are parasitic insects that live on the skin of mammals or birds.
Housefly is not a parasite.

Notes:
The genes control the characteristic by making a specific protein. Genes are the segment of DNA that contains information to form RNA which ultimately forms protein. Each gene contains two alleles and this instructs the cell to make protein for expression of traits.
If the plant has gene for green seeds then it will make protein which will give green colour to seeds.

Notes:
The Carrot plant is biennial and develops, in its second year.