Answer:
a. undergo complete metamorphosis and have segmented bodies
c. undergo complete metamorphosis and have an exoskeleton
Explanation:
Insects are the members of the phylum Arthropoda. They have jointed legs. Their body is segmented externally into the head, thorax and abdomen. Their body is covered by an exoskeleton. Exoskeleton formed from thick non-living cuticle which is made of chitin. In them, fertilization is internal. They are mostly oviparous. Development is direct or may be indirect. In the case of indirect development, there is complete metamorphosis.
The Atmosphere reflects the ocean's colour and it makes the blue sky.
Answer:
1. In order to fix the bacterial to the slide;
<u>so that it will not be lost during the staining procedure.</u>
<u>so that false impression or result will not be given by the bacteria in water,</u>
<u>Distilled water is used to prevent contamination with impurities e,g metals ions and crystals</u>.
Explanation.
In smear preparation; the bacterial cells should also be well dispersed,so that they do not clumped together to form' big glob'.(large round masses) The later affect clear field view of the bacterial mophology, affected staining, and therefore gives inaccurate results,
Fixing to the slide also affects the morphology of bacterial cells, through shrinking in size, which can lead to loss of structural characteristics and extra-cellular matrixes,
