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castortr0y [4]
3 years ago
13

contrast ionic covalent bonds. what happens to the valence electrons how does it affect the elements/compounds

Biology
1 answer:
alexgriva [62]3 years ago
7 0

Answer:

The number of electrons in an atom's outermost valence shell governs its bonding behaviour. Elements whose atoms have the same number of valence electrons are grouped together in the Periodic Table. ... To form a covalent bond, one electron from the halogen and one electron from another atom form a shared pair.

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12 If pressure is applied to a rock until its volume is
mote1985 [20]

Answer: The correct answer to the question is option 2

If pressure is applied to a rock until it's volume is reduced by one half how the new density compares to it's original density is ; THE NEW DENSITY IS TWICE IT'S ORIGINAL DENSITY.

Explanation: Density is defined as mass divided by volume,density increases with pressure and it's determined by spaces between atoms in the object being measured.

Density is directly proportional to Pressure,so when pressure increases, Density increases and when pressure decreases,density decreases.

Density is indirectly or inversely proportional to temperature. so when pressure and density increases, temperature remains constant.

This is applicable to the scenerio with the rock in the question,as the pressure on the rock is increasing,the density is increasing too.

7 0
4 years ago
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Glycolysis occurs in the mitochondria protoplasm cytoplasm of the cell.
dmitriy555 [2]
Glycolysis occurs in the cytoplasm of the cell. You can remember this because even prokaryotic cells can do glycolysis so it must occur without a membrane bound organelle such as a mitochondrion. 

Hope this helps
8 0
3 years ago
Cyanobacteria were the first photosynthetic organisms. How were they responsible for allowing higher life forms to evolve? A. Th
Andrews [41]
B THEY RELEASED CARBON DIOXIDE, WHICH  EVOLVING ANIMALS NEEDED.
6 0
3 years ago
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Populations adapt to changing environmental conditions as a result of __________. populations adapt to changing environmental co
barxatty [35]
Natural selection is the process that result in the adaptation of an organism to environment by means of selectively reproducing changes in its genotype, or genetic constitution. It is the a key mechanism of evolution. Charles Darwin popularised the term "natural selection" contrasting it with artificial selection, which is intentional, whereas natural selection is not.
To make it simple, let's have a group of beetle composing of green and some are brown as an example. here, there is a variation in traits. Since the environment could not support continuous population growth, not all species can reproduce to their full potential. Green beetles can easily be eaten by other species like birds compared to brown beetles. The surviving brown beetles will then generate brown offsprings because their trait has a genetic basis. Since more brown beetles survive and becomes more common in the population, the process continues until all individuals will eventually be brown. so basically, if you have variation, differential reproduction, and heredity, you will have evolution by natural selection as an outcome.
7 0
3 years ago
The brothers pictured below are identical twins. The boys in this picture look alike because their bodies contain identical carb
Romashka [77]

Answer:

nucleic acids.

Explanation:

The fusion of the sperm with the egg results in the formation of a zygote that develops into a new offspring. Twins refers to the two offspring which are a result of the same pregnancy. They are of two types. Monozygotic twins are a result of the single zygote (formed by the fusion of one egg with a single sperm) spiltting into two embryos forming the identical twins. Dizygotic twins are a result of two eggs fertilized with two different sperms forming the fraternal twins.

Identical twins are genetically simliar. The genetic material is derived from the same embryo and thus, the DNA of the identical twins are nearly identical. The spilitting of the embryo formed results in the separation of the same genetic material or identical DNA getting incorporated into the twins making them look alike in majority of the cases.

6 0
3 years ago
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