Important Questions Test: Nutrition in Animals

Euglenas create their own food through photosynthesis, the process of absorbing sunlight to synthesize foods from carbon dioxide and water. An eyespot at the front end of the euglena detects light, and its chloroplasts (structures that contain chlorophyll) trap the sunlight, allowing photosynthesis to occur.

The mouths of leeches have saw-like jaws which they use to pierce the skin and attach themselves so they can suck blood.

On reaching the end of the small intestine, all the digested food products, along with the minerals and vitamins that are useful to the body, should have been removed from the watery contents. Egestion is the act or process of voiding or discharging undigested food as faeces. To egest means to discharge undigested material or food.

Correct Answer :-a, b,c

Explanation : a) Paramecium are unicellular protozoans classified in the Genus Paramecium, and the Kingdom Protista.

b) Amoeba, also spelled ameba, any of the microscopic unicellular protozoans of the rhizopoda order Amoebida. The well-known type species, Amoeba proteus, is found on decaying bottom vegetation of freshwater streams and ponds.

c) Euglena, genus of more than 1,000 species of single-celled flagellated (i.e., having a whiplike appendage) microorganisms that feature both plant and animal characteristics. Found worldwide, Euglena live in fresh and brackish water rich in organic matter and can also be found in moist soils.

Amoeba gets oxygen gas dissolved in surrounding water through its plasma membrane by the process of diffusion.The carbon dioxide gas is also liberated in the surrounding water through the same process of diffusion.

C is the correct option.Amoeba is a unicellular organism in which digestion of food takes place in the food vacuole within the cells.Two enzymes amylase and proteinase have been reported. Thus, amoeba can digest sugars, cellulose and proteins.

Thus, amoeba can digest sugars, cellulose and proteins. Fats, however, remain undigested. The contents of the vacuole become lighter and the outline of the vacuole becomes indefinite indicating that the digestion is complete.

Holozoic is a mode of nutrition in which organisms eat solid food.Animals cannot make their own food so they are dependent on plants for their food.Animals are heterotrophs and they can shallow food.

Digestion refers to the physical breakdown of large pieces of food into smaller pieces which can subsequently be accessed by digestive enzymes. In chemical digestion, enzymes break down food into the small molecules the body can use.

Cellulose is most important diet of herbivores. Cellulose is a major component of tough cell walls that surround plant cells, and is what makes plant stems, leaves, and branches so strong.

Raccoons are omnivores. This means they eat both plants and animals.

The small intestine is an organ located within the gastrointestinal tract. It is approximately 6.5m in the average person and assists in the digestion and absorption of ingested food.

It extends from the pylorus of the stomach to the ileocaecal junction, where it meets the large intestine at the ileocaecal valve. Anatomically, the small bowel can be divided into three parts; the duodenum, jejunum and ileum.

Pancreas is a heterocrine gland as it acts both as endocrine and exocrine gland. It secretes insulin hormone into blood and act as endocrine gland and when it secretes digestive enzymes and juice through pancreatic duct, it acts as exocrine gland.
Hence, pancreas is a mixed gland.
So, the correct answer is 'Pancreas'.

The oesophagus is a muscular tube.Its function is to transport food and fluid, after being swallowed, from the mouth to the stomach.

Enterokinase, also called Enteropeptidase, proteolytic enzyme, secreted from the duodenal mucosa, that changes the inactive pancreatic secretion trypsinogen into trypsin, one of the enzymes that digest proteins.

When a butterfly is not drinking, its "tongue" is wound into a tight coil. The tongue is actually a tube, and it is able to extend and siphon water and nectar into the butterfly's digestive system. These type of mouthparts, called "siphoning," are unique to moths and butterflies.

Bile, or gall, is a dark-green-to-yellowish-brown fluid produced by the liver of most vertebrates that aids the digestion of lipids in the small intestine.

The functions of pseudopodia include locomotion and ingestion.

Amoeba is a single celled organism, that lives in fresh water. It contains cytoplasm which is divided into two parts named as ectoplasm and endoplasm. The ectoplasm is a thin,clear and gel like outer membrane. The endoplasm is water bearing mass which consists of organelles present inside the ectoplasm.

Nerves and blood vessels