The <span>sunflower is considered to be the largest plant without a wooden stem. The sunflower will usually grow more than 120 inches. </span>. It have a hairy stem but it is not wooden, is soft line the plant vines. It tilt during daytime because it usually face the sun.
Answer: Option (d) is the correct answer.
Explanation:
Nucleus of an atom consists of protons and neutrons. Protons are positively charged and neutrons have no charge. So, due to the like charges of protons there occurs electrostatic force of repulsion inside the nucleus of the atom.
But due to similar number of neutrons and protons a force that is able to bind both of them together is known as strong nuclear binding energy.
This force is strong enough that it is able to overcome electrostatic force of repulsion. But when there is great difference in the number of protons and neutrons then binding force is not strong enough.
Hence, the atom becomes unstable and undergoes radioactive decay. So, this means weak forces are responsible for radioactive decay.
Thus, we can conclude that the statement which best describes Yanni’s error is that the strong force is responsible for radioactive decay.
These are called Cell organelles.
Explanation:
- Cell membrane and cytoplasm are present in prokaryotes also.
- In eukaryotes specialised organelles are present that have a definite structure, definite shape and definite function.
- These organelles and their function are:
a) Endoplasmic reticulum: It form s the supporting frame work of the cell and serves as the pathway distribution of material.
b) Golgi apparatus: Synthesis and secretion of enzymes and hormones.
c) Ribosomes: Site of protein synthesis
d) Lysosomes: intracellular digestion,destruction of foreign substances,formation of bones by digesting cartilage
e) Centrosomes: Found only in animal cell Initiates and regulates cell division.
f) Plastids: present only in plands. Contain colour pigment and are responsible for carrying out photosynthesis,providing colour and storing starch.
g)Mitochondria: Known as the power house of the cell and is involved is ATP production.
h) Nucleus: Known as the brain of the cell and controls the functioning of the cell.
