the cell theory states that all new cells come from other living cells, and it's true for both multicellular as well as unicellular organisms.unicellular organisms reproduce through asexual reproduction,There are different types of reproduction like binary fission, vegetative, budding, fragmentation etc reproduction in unicellular organisms, through that they directly divide into new similar cells.
whiltin multicellular organisms, reproduction takes place through sexual reproduction, where male and female gametes are formed in separate reproductive organs and get transferred to form an embryo.
so in nut cell in unicellular organisms there is no specific organs,that is responsible for reproduction, while in multicellular there coplex reproductive system
Answer:
Calcium bromide
Explanation:
When naming compounds, the use of prefixes depend on the type of bond made. In this case, calcium and bromine form a ionic bond because calcium is a metal and bromine is a non-metal.
Ionic bonds are not named using prefixes. So no matter how many atoms there are, you will simply write the name of the element for the first element.
For the second element, you name it as well, but only use the root name and end it with -ide.
2) What advantages do bottles made from plastic have?
3) What disadvantages are there when you use plastic bottles?
4) Why are plastic bowls not used for heating on a cooker?
5) What are the disadvantages of using metal for a toy for a baby?
6) Why is plastic often used for children's toys?
7) What properties would you look for in materials to make a kite?
Answer:
1a) Chemical inertness
1b) transparency
2) extremely less brittle
3) they can melt very easily under moderate heat.
4) they have low melting point
5) metals are hard, meaning they can easily injure a baby. Metals are good absorbers and radiators of heat.
6) they are less hard when compared to metals so they are less probable to cause injuries to kids.
7) material with very low density.
B. A physical change is a change from one state of matter to another; a chemical change results in a new substance formed.
C. A physical change produces a new element, and a chemical change results in a bond breaking between atoms.
D. A chemical change results in a new element being formed, and a physical change results in a new compound being formed.
Answer:
A physical change is a change from one state of matter to another; a chemical change results in a new substance formed.
Physical properties:
Physical properties are those which have same composition. In other words, composition does not change, only state may be change like solid to liquid, liquid to gas, solid to liquid etc.
Example.
Water when freezes into ice, it is physical change, just state is change.
Chemical properties:
The chemical properties depend upon composition.
Example:
Formation of precipitates is an example of chemical change.
2+3a+9a