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How do arthropods grow?
Because of the presence of exoskeleton the growth of an arthropod is periodical. During the growth period the animal loses the exoskeleton, grows and develops a new exoskeleton. This method is named ecdysis, or molting.
Define water losses by visible perspiration? The water losses by visible perspiration are highly variable; the amount could be as high as 4L in hot climate or during strenuous
What is the difference between the concepts of food chain and food web? The chain theory is a theoretical model to study the energy flux in ecosystems. In fact, in an ecosystem
Neurosecretory Systems Almost all groups of multicellular animals have been investigated to find out if neurosecretory cells are present in them. Such investigations have sho
The fact that some pure solutions of hydrocarbons do not readily evaporate at room temperature is a result of- Select one: a. London dispersion forces. b. The hydrophobic
Determine the importance of Behavioural observations Behavioural observations are often noteworthy to the extent that they involve alterations in the examiner's usual response
Absorption of lipids Absorption of lipids is quite different from the absorption of monosaccharides and amino acids. Figure shows the process. The free fatty acids, monoglycer
Extracellular Aging The basic components of extracellular space are mucopolysaccharides and fibrous proteins, particularly collagen and elastin. These proteins are synthesised
Cut wings (ct) is an X chromosome (sex linked) recessive mutant of D melanogaster. Antennaless (al) is an autosomal recessive mutant. A cut, antennaless (homozygous) female is mate
Is transportation of gases in tracheophytes made through the vascular tissues? Carbon dioxide and oxygen are not transported by the xylem or phloem. These gases reach the cells
Which of the following statements about peptide bonds are true? Peptide bonds are amide linkages Peptide bonds form from nucleophillic attack by an electron pair on an alpha-
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