If a chemistry student is given a molecular formula of a molecule, she or he can easily and readily identify if it is compound by checking the bond either a covalent bond or ionic bond. Check the items of each element since elements in a compound are in fixed ratio, she or he can easily identify.
A.
And
D *think this is the answer to this one
Answer:
False
Explanation:
The papillary muscles of both right and left ventricles began to contract shortly before the other ventricular muscles (systole) so that they can take up the slack on the chordae tendineae as the full force of ventricular contractions sends blood against the atrioventricular (AV) valve flaps.
They prevent the backward flow of blood to atria from ventricles. So if they contract after the ventricle systole they would not be able to perform their job.
Answer:
Different researchers break the life cycle of humans into different number of stages. The life cycle of the humans can be categorized into:
Pregnancy: During pregnancy, an embryo is formed from a zygote. Then, eventually a fetus is formed.
Infancy: Infancy can be described as the earliest period after a child is born.
Childhood: The age where the child starts to learn from his environment.
Puberty: The beginning of adolescence is known as puberty. It is the time when various hormonal changes occur.
Adolescence: The late teen ages.
Adulthood: The age when the person has passed the teen ages.
Old age: People above the age of fifty.
Answer:
Explanation:
The living components of the environment are known as biotic factors. Biotic factors include plants, animals, and micro-organisms. The non-living components of the environment are known as abiotic factors. Abiotic factors include things such as rocks, water, soil, light, rocks.
