A signaling pathway would need to be regulated because of efficiency, to make what you need when you need it.
Hope this helps!
During the production of gametes, the chromosomes of a cell have condensed, and the chromatids of homologous chromosomes are crossing over to form new allele combinations. Which of the following is the best conclusion you can make about the life cycle of this cell?
The cell will separate into two daughter cells next, and cytokinesis will occur.
The cell is in prophase I of meiosis and will enter metaphase I next.
The cell will make a copy of each chromosome in order to form diploid daughter cells.
The cell is in interphase II of meiosis and will enter prophase II next.
Answer:
The stages of fertilization can be divided into four processes:
1) sperm preparation,
2) sperm-egg recognition and binding,
3) sperm-egg fusion and
4) fusion of sperm and egg pronuclei and activation of the zygote.
The Moon is very close to the Earth in terms to the other planets; therefore, I believe that they were probably developed around the same time, which would result in common mineral. As for Mars and Venus, are the closest planets to Earth so I would expect that the mineral on these two planets would me similar but not the same due to the distant. I would also believe that the minerals found on Mars and Venus to be similar to Earth but not the same because there are different variables on each planet which could affect the minerals from which the planets are made up of. According to Strobel (2011), “Venus, Earth, and Mars are approximately at the same distance from the Sun. This means they formed out of the same material and had approximately the same initial temperatures 4.6 billion years ago. Long ago these three planets probably had moderate enough temperatures suitable for life. However, Venus is now much too hot for life and Mars is too cold for life” (para. 1).
