Ethyleneis thought of as the aginghormonein plants. In addition to causing fruit to ripen, it can cause plants to die. It can be produced when plants are injured, either mechanically or by disease. Ethylene gasis used commercially to ripen tomatoes, bananas, pears, and a few other fruits postharvest

The development of multi-cellular organisms begins from a single-celled zygote, which undergoes rapid cell division to form the blastula. The rapid, multiple rounds of cell division are termedcleavage. After thecleavagehas produced over 100 cells, the embryo is called a blastula.

Antifeedantsare organic compoundproduced by plants to inhibit attack by insects and grazing animals. These chemical compounds are typically classified as secondary metabolitesin that they are not essential for the metabolism of the plant, but instead confer longevity. Antifeedants exhibit a wide range of activities and chemical structures as biopesticides.

Azadirachtin are extractof neem tree, ithas several effects on phytophagous insects and is thought to disrupt insect molting by antagonizing the effects of ecdysteroids. This effect is independent of feeding inhibition, which is another observed effect of the compound.^1,10The antifeedant/repellent effects are dramatic, with many insects avoiding treated crops, although other chemicals in the seed extract, such as salanin, have been shown to be responsible for these effects.

CSF occupies the subarachnoid space (between the arachnoidmaterand the piamater) and the ventricular system around and inside the brain and spinal cord. It fills the ventricles of the brain, cisterns, and sulci, as well as thecentralcanal of the spinal cord.

The correct option is Sonography. is a process to visualize the structures beneath the skin. A gel containing the Lead Zirconate is used to prevent sound from getting scattered. It assists to diagnose cysts, tumors and many other complications.

DendritesReceive STIMULUS (Action Potentials) andcarry IMPULSESfrom the ENVIRONMENT or from other NEURONS ANDCARRYTHEM TOWARD THECELL BODY. HoweverAXON – A Long Fibre thatCARRIES IMPULSESAWAY FROM THECELL BODY. Each neuron has only ONE AXON. The Axon Ends in a series of small swellings called AXON TERMINALS.

Adrenaline is produced in the medulla in the adrenal glands as well as some of the central nervous system's neurons. Within a couple of minutes during a stressful situation, adrenaline is quickly released into the blood, sending impulses to organs to create a specific response.

Thecochleais a portion of the inner ear that looks like a snail shell (cochleais Greek for snail.) Thecochleareceives sound in the form of vibrations, which cause the stereocilia to move. The stereocilia then convert these vibrations into nerve impulses which are taken up to the brain to be interpreted.

Aspergillus flavusis the fungi which grows on plants such as peanut plant. It is used in the production of the antibiotic Flavicin. It is alsoused to producethe carcinogenic substance Aflatoxin.

The iris of the eye is the thin, circular structure made of connective tissue and muscle that surrounds the pupil. The color of our eyes is determined by the amount of pigment in the iris apart from this the iris acts like the diaphragm of a camera and controls the size of the pupil. One muscle within the iris constricts the pupil in bright light (full sunlight, for example), and another iris muscle dilates (enlarges) the pupil in dim lighting and in the dark.