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Q. Do echinoderms have an excretory system? How is excretion done in these animals?
Echinoderms do not have an excretory system their excretions are eliminated by diffusion.
Concerning the thickness of their walls how different are the heart chambers? The ventricle walls are thicker than the atrium walls as ventricles are structures responsible for
Basic Research Terms: Some of the basic terms that are defined in this section are: Assumptions Operational Definitions Variables Delimitation and Limitation H
Pollination Pollination refers to the transfer of pollen from dehiscing anthers to the pistil. Unlike animals, plants cannot move to their mates for sexual reproduction. Henc
What are the plant root hairs? Where can they be found and what is their function? The root hairs are external elongated projections of the root epidermis. Their role is to
Q. What is the ecological role of earthworms? Earthworms have an important ecological role as they eat decomposing organic material. They also dig tunnels in the subsoil allowi
binomial nomenclature
Evolutionary relationship among various animal groups is depicted in the cladogram given below. P, Q and R respectively shown: a. Vertebrae, hair and four limbs. b. B
what is septum
Q. What are the major structures of the human eye? The major structures of the human eye are the iris, the cornea, the pupil, the ciliary muscles, the crystalline lens and the
Which of the following is true for endocytosis? A. During endocytosis of GLUT4 transporters in fat cells, there is removal of GLUT4 transporters from plasma membranes. B. Du
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