Answer:
the first question answer is SKIN PIGMENTATION
The secone question answer is D “Asexual reproduction can increase the population in a very short amount of time”
After wind erosion, the igneous rock turns to sediment. It may be dropped into a river where the sediments go through cementation and compaction. Then it become a sedimentary rock. This cycle goes on forever. It is called the rock cycle.
Answer;
During Prophase 1 of meiosis there is crossing over
, while,
Prophase of mitosis has no crossing over
Explanation;
-The daughter cells produced by mitosis are identical, whereas the daughter cells produced by meiosis are different because crossing over has occurred.
-The events that occur in meiosis but not mitosis include homologous chromosomes pairing up, crossing over, and lining up along the metaphase plate in tetrads.
-During prophase 1 of meiosis; chromosomes become visible, crossing-over occurs, the nucleolus disappears, the meiotic spindle forms, and the nuclear envelope disappears.Crossing-over is the process that can give rise to genetic recombination. At this point, each homologous chromosome pair is visible as a bivalent (tetrad), a tight grouping of two chromosomes, each consisting of two sister chromatids. The sites of crossing-over are seen as crisscrossed nonsister chromatids and are called chiasmata.
Answer:
A. The process of reciprocal inhibition.
Explanation:
In our body, not all the muscles contract and relax simultaneously. The muscle supporting certain reflex are contracted while the others need to be relaxed at that time. In the process of reciprocal inhibition, when a message of contraction is sent by the central nervous system to the agonist muscles, the tension in the antagonist muscles is inhibited by the impulses from the spinal interneurons so that the antagonist muscles get relaxed simultaneously and the reflex action can be completed without causing any damage to our muscular system. If both agonist and antagonist muscles will contract and relax simultaneously, there may be tear in the muscles that's why reciprocal inhibition is a important phenomena occurring in our body.
Approximately 49 percent of all motorcycle crashes occur when the other vehicle was turning left.
Every year number of motorcycle accidents are changes and the percentage is also changed accordingly, so this the approximate range.
Each year in many countries, motorcycle crashes kills thousands of people and thousands are injured.
Motorcycle accidents mostly happen when a car driver makes a left turn which is going in front of a motorcyclist.