Who classified organisms in five kingdom system?
Which of the following group of animals have cell aggregate body plan ?
Organ system grade of body organization is found in :-
Which of the following is incorrectly matched ?
Stinging cell organelles - nematocysts are found only in :-
In which phylum pseudocoelom is present ?
Flatworms are found in :-
Star fish is the member of :-
Balanoglossus is an example of :-
Which of the following is not a bony fish ?
Which statement is not correct for amphibians ?
Which class includes snakes and lizards ?
In which class birds are included ?
Sound producing organ in birds is :-
The syrinx is the vocal organ of birds. Located at the base of a bird's trachea, it produces sounds without the vocal folds of mammals. The sound is produced by vibrations of some or all of the membrana tympaniformis (the walls of the syrinx) and the pessulus, caused by air flowing through the syrinx. This sets up a self-oscillating system that modulates the airflow creating the sound. The muscles modulate the sound shape by changing the tension of the membranes and the bronchial openings.The syrinx enables some species of birds (such as parrots, crows, and mynas) to mimic human speech. Unlike the larynx of mammals, the syrinx is located where the trachea forks into the lungs. Thus, lateralization of bird songis possible and some songbirds can produce more than one sound at a time. Some species of birds, such as New World vultures, lack a syrinx and communicate through throaty hisses.
Which statement(s) is (are) true for mammals ?
In Earthworm the body is divisible into :
The earthworm is made up of about 100-150 segments. The segmented body parts provide important structural functions. Segmentation can help the earthworm move. Each segment or section has muscles and bristles called setae. Explanation: The earthworm body is divided into ringlike segments (as many as 150 in L.terrestris. Some internal organs, including the excretory organs, are duplicated in each segment. Between segments 32 and 37 is the clitellum, a slightly bulged, discolored organ that produces a cocoon for enclosing the earthworm's eggs.
Earthworm has an unsegmented band called :
Clitellum occur in segments :
Clitellum. The clitellum is a thickened glandular and non-segmented section of the body wall near the head in earthworms and leeches, that secretes a viscid sac in which the eggs are deposited. It is located near the anterior end of the body (around the 14th, and 16th
Setae occur all over the body except segments :
Earthworm belongs to phylum :
Structural element of cell wall is :-
Different layers of cell wall are :-
The first wall layer of cell is :-
Plant cells are distinguishable from animal cell in containing :-
Ripe fruits soften due to :-