Physical properties are those which can be observed without any change in composition of the substance. Hence, a is the answer.
Answer:
The same genes or slightly different versions of the same gene can be found on each chromosome in a pair. They form a line and split off bits of themselves, which they barter with one another. In sexual reproduction, crossing over is the first method that genes are shuffled to develop genetic variation.
Answer:
it will option B ,hope it helps
Thallium has got 81 protons
<u>Have a nice days.......</u>
The atomic mass on the periodic table represents the sum of number of protons and number of neutrons.
Atomic mass = Number of protons + number of neutrons
Hope this helps!