Answer:
a.)It will rise faster in cooler air
a.) heat
Explanation:
i
A hot air balloon rises faster if cold air were to surround it due to density differences between the air in the two medium.
- Hot air is less dense as the average kinetic energy of the molecules is greater.
- Cold air is denser.
- This density contrast causes the balloon to move up at a high pressure.
ii. Heat
The average kinetic energy of the molecules in a substance is termed heat.
Heat is a form of thermal energy measured by the kinetic energy possessed by molecules in a substance.
The calcium that triggers muscle contraction is stored in synaptic vesicles called endoplastic reticulum. that is not the only function of the endoplastic reticulum it is also a network of a membranous tubules within the cytoplasm of a eucryotic cell continuous with the nuclear membrane.
I don’t know this question sorry lil bro :(
Answer:
Production of surfactant Secretion of mucus
Explanation:
hope this helps
Answer:
The option that best describes the advantages of pest resistance is:
<em>Farmers do not have to use harsh chemicals to save their crops.</em>
Explanation:
A pest can be described as an animal particularly an insect which damages plants or crops. Formerly, farmers had to use chemicals to kill insects which attacked the crops. These chemicals would affect the plants also. The insects also developed resistance for these chemicals after a short period of time.
Now, the techniques of biotechnology have made it possible to make crops which have pesticide resistant genes in them. These crops are hence not affected by the pesticides.