Answer:
Option B, The average number of food vacuoles formed in 30 min would decrease.
Explanation:
As we know ink solution act as a food source for the T vorax culture. The higher will is the amount of solution added, the higher will be the number of food vacuoles formed in a given time period.
Therefore, when 20 micro liter of ink solution is added instead of 100 micro liter of ink the food vacuole number will decrease.
Hence, option B is correct
Answer:
Differences between metals and non-metals
Explanation:
Metals are elements that have luster.
Non-metals are elements that do not have luster. They are dull.
There are one to three electrons in the outer shell of the metals.
There are four to eight electrons in the outer shell of the non-metals.
Metals are a good conductor of heat and electricity.
Non-metals are the bad conductors of heat and electricity.
Metals are malleable, ductile, and sonorous.
Non-metals are brittle, non-ductile, and non-sonorous.
I don’t know if this is right but I think it’s D.
sorry if it’s wrong;(.
m= no of neutron+ number of proton
=8+8
=16
charge= number of electron- number of proton
=8-8
=0
hence, element is oxygen