Lysosome are special vesicles containing enzymes
Answer: Option (A) and (D) are correct.
Explanation:
Atomic number means the number of protons holded by an atom. On the other hand, atomic mass means the sum of total number of protons and neutrons holded by an atom.
For example, in an isotope of oxygen as oxygen-15 with an atomic number 8 means that there are 8 protons.
So, number of neutrons present in oxygen-15 will be as follows.
Atomic mass = no. of protons + no. of neutrons
15 = 8 + no. of neutrons
no. of neutrons = 15 - 8 = 7
Hence, this isotope of oxygen atom has 8 protons and 7 neutrons.
Nitrogen and carbon are considered molecules
Answer:
B. A bridge-like connection is created between bacterial cells for genetic material to be transferred.
Explanation:
A. There is a change in the nucleotide sequence of a DNA molecule. - this is describing a genetic mutation
B. A bridge-like connection is created between bacterial cells for genetic material to be transferred. - this is <u>conjugation</u>, a type of genetic transfer between donor and recipient bacterial cells. It is a way that bacterial cells achieve genetic variation. For example, bacteria can share antibiotic resistance genes between one another. They do not directly contact one another, instead, they use a structure called a pilus to exchange material
C. A bacterial cell takes DNA fragments from a dead cell and incorporates them into their DNA molecule. - this is transformation, another type of genetic transfer where bacterial cells take up bacterial DNA from the environment. These molecules of DNA are usually from dead bacteria
D. There is a transfer of DNA from bacterium to another by a virus. - this is another type of gene transfer called transduction, where a virus takes genetic material from one bacteria to another.
<span>she opens her eyes but does not answer any questions.
This is because she is suffering from dementia. She does not know what to do in your shoes anymore because she lost her humantiy.</span>