Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n2) electrons.
Answer:
The correct answer is tissue.
Explanation:
A group of cell which are specialized, similar in structure, and function together in a coordinated manner is known as tissue. There are different types of tissue present in animal and plant cells, for example, in animals the four types of tissue is connective, epithelial, nervous and muscle tissue.
These tissue comes together to form organs like heart, brains, kidney, etc. Two or more tissue types can make an organ. Different tissue performs a different function. For example, nervous tissue helps in transferring nerve impulse, connective tissue connect different tissue. So the correct answer is tissue.
The right answer is C.invention
Contact lenses are placed directly on the surface of the eye to correct your eyesight.
They can correct myopia and hyperopia. They can also correct age-related astigmatism and hyperopia (presbyopia).
Their principle is the same as for glasses: they bend the light and redirect it to your retina to improve your eyesight.
there are 4 chromosomes in the sex cells of each fly
There are choices for this question namely:
a. cementation of clastic sediments and precipitates from seawater
<span>b. compaction and recrystallization of volcanic material </span>
<span>c. regional metamorphism of sedimentary and igneous rocks </span>
<span>d. contact metamorphism of unconsolidated gravel
</span>
The correct answer is that the bedrock of the Adirondock mountains is formed mainly by regional metamorphism of sedimentary and igneous rocks. The geology of the Adirondock mountains formed around 5 million years ago with rocks over 1000 million years old. At this very ancient age, the sedimentary and igneous rocks in the Adirondock mountains have undergone extensive heat and pressure hence regional metamorphism of the existing sedimentary and igneous rocks.
