The answer to this is The Females give birth to live young and their endoskeleton is made up of chitin.
The statement they breathe using gills isn't the right answer because that is part of fishes not a mammal and fishes lay eggs not live young.
The statement the females have mammary glands isn't right because only male mammals have that.
So your true statement is The females give birth to live young and their endoskeleton is made up of chitin.
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Answer: b) is waves of muscular contractions that move along the length of the digestive tract.
Explanation:
a) is not right, since the movement is triggered by a signal sent to the brain, which coordinates the movements.
c) is not right, since the esophagus smooth muscle is arranged in circular and longitudinal muscle layers.
NOTE: the peristalsis do not only ocurrs in the esophagus. It also occurs in all the digestive tract, as well as in the bile conducts and also in the urinary system, to conduct the urine from the kidneys to the bladder.
Osmosis is said to be the tendency of a fluid, usually water, to pass through a semi permeable membrane (as of a living cell) into a solution where the solvent concentration is higher thus equalizing the concentrations of materials on either side of the membrane.
When sugar is placed on a straw berry, the thin film of moisture on the berry skin begins to dissolve the sugar. Once this happens, the dissolved sugar forms a higher solute concentration on the skin of the berry than that found in the (plant) cells of the berry. A concentration gradient is formed and water molecules from the berry cells move down that gradient to the outside of the berry skin and dissolve the sugar to form a gooey solution.
The computer chips come from semi conductive minerals usually germanium, silicon, and finding those in nature is not always easy but, they are minerals they are properly manufactured, firstly they are melted down and then are pulled into a giant single crystal that is perfectly shaped to fit the needs of the computer chip manufacturer, then they are cleaned and cut within a few thousandths of a inch usually thinner than a piece of paper and smaller than a rice grain, then etched with UV resin, washes, and copper to make microscopic pathways for transistors and so forth, then after that they are put into they're cases and have the very small like thinner than a hair small gold electrical wires attached to each point of the chip.So from a outside perspective yes they are still minerals but refined and manufactured to fit a purpose entirely different than the material itself is.