The sun have magnetic pole reversal other than earth.
A shift in the magnetic field of the earth to the opposite polarity is known as a magnetic polarity reversal. Throughout the course of geologic time, this has happened sporadically.
The magnetic field decreases but does not vanish entirely after a pole reversal. Though there may be some particulate radiation that reaches Earth's surface, the magnetosphere and the atmosphere continue to shield the planet from cosmic rays and charged solar particles.
So, The correct option is D.
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Answer:
the sun
Explanation:
Answer:
animal like protists are called protozoa
Explanation:
this is because of the presence of single-cell, characteristics such as inability to produce food for themselves
Answer:
Both the symbiotic and the predator/prey relationships evolve together. For the symbiotic take the example of the bird on the rhino's back. They are both in the same environment so their relationship evolves (develops) together, helping each other out. The bird gets to eat the bugs on the rhino and the rhino is kept for being infested with bugs. In the predator/prey situation, think about the lion and antelope. The lion is the predator looking for food. The prey is what he eats. Only the fastest and most able-bodied lions are going to get the antelope. In order for the antelope to survive, it must become swifter and better able to conceal itself. The best of both animals will survive thus strengthening their blood lines. The difference between how the pairs evolve is their interaction. Symbiotic help each other; they don't do harm to one another. Predator/prey relationships is the opposite. The lion intends to do harm to the antelope. He needs the antelope for food.
Explanation:
B. shared; atoms
C. transferred; ions
D. transferred; atoms
Option B is correct.
B. shared; atoms
A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
Answer:
B. shared; atoms
Explanation:
Covalent bond is formed by sharing of electrons between two atoms. In this way full outer shell is achieved by both the atoms. Since there is no gain or loss of electrons, no ions are formed in the process.
It is usually formed between the atoms of similar electronegativity. It can be of many types like sigma bond, pi bond etc. If a pair of electrons is shared, it's a single bond. If two pairs are shared, it's a double bond and if three pairs are shared, it's a triple bond.
Answer is labyrinthodont
About 110 million years ago, labyrinthodonts ( maze-toothed), a group of extinct amphibians. They were evolved from lobed-finned fish in the Devonian period. They were dominant animals in the rift valley was present at that time between Antarctica and Australia.
Genetic Drift
Explanation:
Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance or sampling error. Genetic drift occurs in all populations of non-infinite size, but its effects are strongest in small populations. This process may result in the loss of some alleles (including beneficial ones) and the fixation, or rise to 100% frequency, of other alleles. It also have major effects when a population is sharply reduced in size by a natural disaster (bottleneck effect) or when a small group splits off from the main population to found a colony (founder effect).