Answer:
Lactation – the child feeding stimulates milk production which causes further feeding (continues until baby stops feeding)
Ovulation – the dominant follicle releases oestrogen which stimulates LH and FSH release to promote further follicular growth
The cell membrane of cells present in tubeworm is selectively permeable and they prevent minerals in the water from flowing it in the cell of tube worms. By doing this the cell membrane protects the cell from any osmotic damage. By selectively preventing these minerals it maintains the stable environment in the cell.
A- gripping tail to grip trees and branches
Hypotonic would mostly likely cause a plant placed in it to become firmer and more rigid.
Most organisms in the top levels of an energy pyramid require more food than those on lower levels. On top of this, each level of the pyramid looses energy gained from food. This means that there needs to be more lower leveled organisms for the ones on top to eat in order to gain enough energy. Because of this, there's only enough food for a few of these types of organisms.
I hope this helped! There are probably a few more details you can add, but this is the overall reason :)
