Answer: The rate of diffusion is directly proportional to the molecular weight of any gaseous substance
Explanation:
According to Graham's law of diffusion, the rate of diffusion is directly proportional to the molecular weight of the gaseous substance.
Hence, the lighter the molecular weight, the faster the diffusion.
Answer:
Bacteria
Explanation:
Unicellular organisms that lack nucleus or chlorophyll hence are neither plants or animals are classified as Bacteria.
They are known to survive extreme environment such as saline , extremely hot or cold environment.
The new organism had been found several feet below in an ice sampe. This is an extremely cold only a Psychrophillic organism can survive here. The organism is most likely to be classified as a Bacteria .
What is Sickle cell anemia?
Sickle cell is an autosomal recessive trait of humans that arises through mutation in normal gene. The gene for this trait is found in recessive form and you need two copies of the gene - one from father and one from mother- to have the trait expressed. If the trait is expressed it causes a disease called sickle cell anemia.
People with the sickle cell anemia disease have red blood cells of crescent or sickle shape. The red blood cells of this shape can cause many complications in body. They get stuck in blood vessels and cause pain. They also die quickly and make a person anemic (pale).
Probability to have a child with sickle cell anemia:
If a mother is normal but a father is carrier for the trait, then the situation will be as:
Here N indicate normal allele, S indicate allele for sickle cell anemia.
Mother ˣ Father
NN NS
Gametes: N N N S
Offspring: NN NS NN NS
50% : Normal
50% : Carrier
0% : Sickle cell anemia
It means that 50 % kids will be normal and 50% will be carrier for the trait and none of the offspring will have disease Sickle cell anemia.
However, those who are carriers can carry the disease to the next offspring if they are married to a carrier or a person with sickle cell anemia.
I would say to be safe age 11.
Answer:
The correct answer will be option A-the accepted model of the atom was changed.
Explanation:
J.J Thomson discovered the electrons by cathode ray tube experiment in 1897 and realized that the accepted model of atom as proposed by the Dalton has problems as he stated that "atom is indivisible".
The discovery of sub-atomic particles-electrons in his experiments showed that the atom can be divided into sub-atomic particles and he proposed the pudding model of the atom which changed the accepted model of atom at that time.
Thus, option A-the accepted model of the atom was changed is the correct answer.
