Free Biodiversity and Variety of Life MCQs with Answers

971. Deuterostomes have:

• A. Spiral Cleavage
• B. Mouth develop form blastopore
• C. Mesoderm is formed form developing gut
• D. Schizocoelous

Explanation: Option C is correct.Deuterostomes have mesoderm formed from the developing gut. Deuterostomes are a group of animals that includes echinoderms, chordates, and hemichordates. They are characterized by the fact that their blastopore develops into the anus, while the mouth develops secondarily. In deuterostomes, the mesoderm is formed by a process called endocoely. Endocoely is a type of embryonic development in which the mesoderm forms from pouches that bud off from the developing gut. The mesoderm is a middle layer of tissue that forms between the ectoderm and endoderm. It gives rise to a variety of tissues and organs, including muscles, bones, blood, and the gonads.The formation of the mesoderm from the developing gut is a unique feature of deuterostomes. It is thought to be an adaptation that allows deuterostomes to grow and develop more complex bodies than their protostome counterparts.

972. Malpighian tubules are characteristic of:

• A. Mallard
• B. Leech
• C. Cockroach
• D. Star fish

Explanation: Option C is correct.Malpighian tubules are characteristic of cockroaches. Malpighian tubules are excretory organs that are found in insects and some other invertebrates. They are responsible for filtering waste products from the blood and transporting them to the rectum, where they are eliminated from the body. Malpighian tubules are long, thin, and coiled tubes that are located in the abdomen of insects. They are made up of a single layer of cells. Malpighian tubules filter waste products from the blood and transport them to the rectum. The waste products are then eliminated from the body in the form of feces. There are usually between six and eight Malpighian tubules in each insect. The number of Malpighian tubules can vary depending on the species of insect. Malpighian tubules are located in the abdomen of insects. They are attached to the gut by a short duct.

973. In which era manimals dominated?

• A. Paleozoic
• B. Mesozoic
• C. Cenozoic
• D. Proterozoic

Explanation: Option C is correct. Mammals dominated the planet during the Cenozoic Era, which began about 66 million years ago. This era is also known as the Age of Mammals. It is characterized by the rise of mammals and the extinction of the dinosaurs. The Cenozoic Era is divided into three periods: the Paleogene, the Neogene, and the Quaternary.

974. Periplaneta belongs to which phylum?

• A. Mollusca
• B. Annelida
• C. Echinodermata
• D. Arthropoda

Explanation: Option D is corrrect.Periplaneta americana, also known as the American cockroach, belongs to the phylum Arthropoda. Arthropoda is a large phylum of animals that includes insects, spiders, crabs, lobsters, and centipedes. It is the largest phylum in the animal kingdom, with over 1 million known species.

975. The survival of an animal depends upon its ability to take some_from enviroment?

• A. Hydro carbons
• B. Organic molecules
• C. Chemical
• D. All of these

Explanation: An animal's survival does depend on its ability to take chemicals from the environment. An organism obtains the chemicals necessary for its survival from the environment.These chemicals include: Water: Water is essential for all life. It is used for a variety of purposes, including transporting nutrients, removing wastes, and regulating body temperature. Food: Animals need food to provide them with energy and the nutrients they need to grow and reproduce. Food can be obtained from plants, animals, or other sources. Oxygen: Oxygen is essential for cellular respiration, the process by which cells produce energy. Oxygen can be obtained from the air or from water. Other chemicals: Animals also need other chemicals, such as minerals, vitamins, and hormones, for their survival. These chemicals can be obtained from the food they eat, the water they drink, or the air they breathe.

976. Chitinous Setae are the locomotary organs of annelids which are present on?

• A. Cell wall
• B. Prostomium
• C. Nucleolus
• D. Parapodia

Explanation: Option D is correct. Chitinous setae are the locomotory organs of annelids. Setae, are small, bristle-like structures that are made of chitin. They are found on the parapodia, which are fleshy appendages that project from the sides of the annelid's body. The setae help the annelid to move by providing traction. Here are some additional details about setae and parapodia: Structure: Setae are small, bristle-like structures that are made of chitin. They are typically arranged in two rows on each side of the parapodium. Function: Setae help the annelid to move by providing traction. When the annelid contracts its muscles, the setae grip the substrate and help to pull the annelid forward. Location: Setae are found on the parapodia, which are fleshy appendages that project from the sides of the annelid's body.

977. Polychaeta have which of the following organs?

• A. Tentacles
• B. Palps
• C. Wings
• D. All of these

Explanation: Option B is correct.Polychaeta have palps. Palps are paired, sensory organs that are located on the head of polychaetes. They are typically long and slender, and they are covered with sensory bristles. Palps are used to sense food, predators, and other environmental cues Palps are located on the head of polychaetes. Palps are typically long and slender, and they are covered with sensory bristles. Palps are used to sense food, predators, and other environmental cues. Some examples of polychaetes with palps include Nereis, Arenicola, and Nephtys.

978. Ascaris Lumbericoides is a:

• A. Intestinal parasite
• B. Blood parasite
• C. Stomach parasite
• D. Ureteral parasite

Explanation: It is an intestinal parasite of humans. It is the most common human worm infection .

979. Class Aves has advanced:

• A. Pons
• B. Medulla
• C. Cerebrum
• D. Cerebellum

Explanation: D is correct. Aves have advance cerebellum.

980. In which of the following animals, placenta is formed?

• A. Prototherians
• B. Metatherian
• C. Eutherians
• D. All of these

Explanation: Eutheria are a group of mammals consisting of placental mammals. The placental mammals include such diverse forms as whales, elephants, shrews, and humans.