Answer:
True
Explanation:
Meiosis is a type of cell division that occurs in gametic cells. In this cell division, one cell is divided into four cells and the chromosome number is reduced to half therefore it is also called reduction division.
During meiosis crossing over occurs between homologous chromosomes that allow the exchange of genetic material between them that results in the formation of genetically unique daughter cells.
In spermatogenesis during the first meiosis division, the homologous chromosomes get separated into two daughter cells reducing the chromosome number by half and during second meiotic division sister chromatids separate into two more cells. Therefore four genetically different cells are generated.
Answer:
due to natural selection , if the predator of the gazelle declines, then the prey the gazelles will increase since there isn't many cheetahs killing them anymore.
the second should be competition, since there will be more gazelles needing to eat.
Explanation:
Answer:
The movement of feet in the position to walk on trail which is tilted is called eversion and inversion movement.
Explanation:
Eversion and inversion movement:
In eversion movement, foot sole rotates away from the midline of body or median plane (turn outwards) while in inversion movement, sole of foot rotates towards the midline of body or median plane (turn inwards).
<u>Answer:</u>
A recombinant DNA molecule is produced by "genetic recombination laboratory methods".
<u>Explanation:</u>
The genetic recombination laboratory methods like molecular cloning is responsible for rDNA molecules formation. The steps involve pooling of genetic material from number of sources and generate very unique sequences which is not available in the genome.
The another method used for recombinant DNA molecule production is Polymerase chain reaction (PCR). This involves millions to billions of copies of a single DNA sample which allows easy access for scientists to take minute amount of DNA sample and make it to a appropriate large amount, as needed to follow deep analysis.
Answer:
Axon hillock
Explanation:
Neuron or nerve cell is excitable cell of the nervous system which consists of cell body or soma (karyon), dendrites and an axon. Dendrites are short, numerous filaments responsible for the signal receiving. On the other hand, axon is long ant it originates form the cell body from the swelling called axon hillock. At the end of an axon there are axon terminals from which neuron can transmit a signal another cell.