Nucleic and amplification test
Answer:
B. Corundum
Explanation:
Using the Mohs scale of hardness, the mineral has a hardness greater than 6.5 (Steel nail) but less than 8.5 (Drill bit). The corundum has a hardness of 9.0, which means it cannot be scratched by a drill bit, but all the other choices have a hardness scale less than 6.5 but the mineral was not scratched by the nail. So the best answer would be B.
Answer:
The correct answer is: option D. all of the above.
Explanation:
In sexual reproduction, two opposite gender gametes are fused together to form a zygote by the process called fertilization which forms the new organism that is genetically unique.
In diatoms, sexual reproduction caused various types of advantages such as higher or enhanced genetic variability as recombination occurs. It also helps the ability to responding to environmental change Increasing the population or species size and other.
Thus, the correct answer is: option D. all of the above.
Answer:
The process of asexual reproduction works by mitosis in which a parent cell divides into two or more new identical daughter cells. The number of chromosomes is never changed in such kind of division. A cell must make a copy of its genetic material before the process to ensure that each daughter cell carries the same genome as the parent cell. Vegetative propagation, budding, binary fission etc are examples of some of the methods of asexual reproduction.