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.
Answer is number 1
Oxygen O2
Ozone O3
The three principal organs of seed plants are roots, stems, and leaves. Roots: absorb water and dissolved nutrients. anchor plants in the ground.
An unknown mtDNA sample sample is matched to a sample of mtDNA that was found at the crime scene.<span> This is how mitochondrial DNA (mtDNA) typing is used in forensic science.</span>
<span>Unlike nuclear DNA typing, mtDNA isolation is quite easy because its number is quite large. mtDNA copies rang from 100 to 10,000 per cell. It is also more stable and stronger than the nuclear DNA; that is why even unsolved cases from years ago use mtDNA typing as reference for possible conclusion.</span>
Answer:
genetic modification competitors increase
Explanation:
The fish developed the gills because of <em>genetic modification</em>. Because the fish are now able to swim in deep water, their <em>competitors</em> in shallower water will have less food. Likewise, competition for food among deep-water fish that eat the same types of food will <em>increase</em>.