1. How many muscles are in the human body?
2.What diseases affect the muscular system?
3. What are the functions of the muscular system?
4.what are two types of muscle fibre?

Q. In an ________ solution, red blood cells ________. Group of answer choices:
- Hyposmotic, lose water and shrivel
- Isomotic, have a normal shape ✔️
- Isosmotic, swell and may burst
- Hyperosmotic, have a normal shape
- Isosmotic, lose water and shrivel

In an <u>isosmotic</u> solution, red blood cells <u>have</u><u> </u><u>normal</u><u> </u><u>shape</u><u>.</u>
Option B
<h3><u>Explanation:-</u></h3>
Osmosis : The movement of the <u>solvent</u> or <u>water</u> molecules from a solution of their higher concentration to a solution of lower concentration through a <u>semipermeable membrane.</u>
❍ Depending upon the <u>osmotic concentration,</u> There are three types of solution and their result when cell is keot inside them:
- Hyposmotic (Water enters, Swells up)
- Isosmotic(Equal flow, No change)
- Hyperosmotic(Water comes out, shrinkage)
<u>━━━━━━━━━━━━━━━━━━━━</u>
Yes, this is correct!
Let's imagine two systems, one with 50 species and one with 4000. Both of them experience a draught and as a result 25 species of the first one die (that's quite likely) and 800 of the second population die out (more would not be very likely).
So the first one lost 50% of species and the second one 20% - that means that the second one, with greater biodiversity has a bigger stability:)
The final phase the 5th phase I think