Answer: Option A
Explanation:
Kinesin -1 is the major anterograde motor which helps in the transportation along micro tubules. This is important for the proper transport of the mitochondria, Golgi derived vesicles, endoplasmic reticulum tubulin, mRNA and intermediate filament sub units.
It moves along the micro tubules and for this task it gets energy from the adenosine triphosphate.
The heavy chain of KInesin 1 is made of globular head via short flexible neck and has a light chain as well which ends in the carboxy terminal.
The key effect that results in the stimulation of eating is to activate NPY neurons within the hypothalamus. Infusion of ghrelin stimulates food intake in the brain. NPY or Neuropeptide Y acts as a neurotransmitter and NPY stimulates human from eating.
Answer:
"Lipids are an essential component of the cell membrane. The structure is typically made of a glycerol backbone, 2 fatty acid tails (hydrophobic), and a phosphate group (hydrophilic)."
The right option is; D.Trawling
Trawling is the method of commercial fishing that tends to produce excessive bycatch.
Trawling is a method of fishing in which a trawl (fishing net) is dragged through the water at a specific depth behind one or more trawlers. Trawling is usually used for commercial fishing, and it tends to produce excessive bycatch; a condition in which non target marine organisms such as seabirds are incidentally caught, while catching target species such as crabs and fish.
Answer: The advantages of spines in these unrelated organisms are as follows:
- for escape and defence
- for regulations of body temperature
- for conservation of water
Explanation:
The evolution of spines in Tenrecs, echidnas and hedgehogs represent STRUCTURAL ADAPTATION i.e when a part of the body of a living organism undergoes changes to become structurally adapted to its mode of life.
- The evolved spines in hedgehogs are for physical defence
- in tenrecs, they are for physical defense
