Answer: I believe <u>option A.</u> is correct.
Explanation: When you look at both the cells, you see that cell A. shows the molecules diffusing in and out of the cell membrane. Where as, cell B. doesn't show as much.
Hope I could help! :)
The correct answer is - satellite.
The satellites are something that is crucial for the functioning of the modern day world in pretty much all aspects. They are also very important in the climatology and meteorology. The satellites are able to monitor the whole planet, thus through them it can easily be seen where the air masses are moving, what type of air masses are moving towards where, their speed of the air masses, is there clouds, and if there is where are they moving, formation of large storms etc. ll of these information from the monitoring of the satellites go to the weather stations, where the weather forecasts are made, and than through the media reach the people all over the world.
Answer:
there is no picture so I can't tell :)
Mitosis and cell differentiation leads to the creation of red blood cells in the body from bone marrow stem cells by a process called Erythropoiesis.
<u>Explanation</u>:
The process of development of red blood cells from bone marrow stem cells is called as erythropoiesis. The process is enthused by lower amount of oxygen during circulation, which is sensed by the kidney, after which it starts secreting a hormone called erythropoietin. In production of RBCs, the erythropoietin provokes the development and differentiation. All this phenomenon happen inside the Bone marrow. Throughout the creation of RBCs, there undergoes a sequence of mitosis and differentiation.
Answer:
The correct answer is C
Explanation:
In asexual reproduction method, the offspring generated is identical genetically to the parents. But this is not the case in sexual reproduction. The reason being that the gametes or sex cells produced has only one set of chromosomes and are therefore haploid after the process of meiosis. Meiosis is the process when the offspring formed has chromosomes from two parents and is not identical to the parent. Only certain characteristics are inherited by the offspring from both the parents and offspring has different set of characteristics.
There is a process of assortment taking place inside the cell when the double set of chromosomes becomes one set in a gamete. Out of the pair of chromosomes, there is a random selection. Due to this random assortment, there is a genetic variation between the gametes as the gene alleles on the chromosome are not the same. This principle is said to be the Mendel’s first law of segregation.
Another process of combining chromosomes is the crossing over during the meiosis stage which results in variety of chromosomes. We can say that recombination is possible.
Hence, we can note that during assortment and crossing over, there is no chance for two offspring to be identical to the same mother or father with the exception of identical twins. In the case of identical twins, the genetically identical characteristics develops from same fertilized egg.
From the above process, the structure of gene gets changed creating a variant that can get transmitted to next generation. The change is caused by altering the single base units of DNA or rearranging larger section of genes.
