The stem is the part of the plant which contains vascular tissue. or the piping, of the plant
Answer:
The correct answer is single,double and triple covalent bonds .
Explanation:
A carbon atom can form a single bond with another carbon atom example ethane.
A carbon atom can form a double bond with another carbon atom example ethylene
A carbon atom can form a triple bond with another carbon atom example acetylene.
But during the formation of Carbon carbon single bond or double bond or triple bond the valency of carbon atom that is 4 is always maintained.
If the statement is asking whether it is true or false, the
answer is true. The body can make its own lipid because of the food that we eat
and also because it is found in the body where it is located in the tissues and
the cells. It does compose of ring structure as it has multiple rings which are
considered essential and the lipids are considered to be a part of a cell
membrane.
Molten material is allowed to solidify into the final shape.
Casting defects occur during solidification:
Gas porosity
Shrinkage
Two stages of solidification:
Nucleation
Growth
