Can someone help me with this? 1. Why phylogenetic trees may construct using different regions of the DNA look different?
2. What regions of DNA should you use to compare organisms that are closely related?
3. What kind of genes should you use to compare organisms that are evolutionarily distant from each
other?
4. Can you think of reasons why, if you are studying more distantly related organisms, it is better to
compare amino acid sequences than DNA sequences?

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

answer: 20 percent

the fish culture has become a developing commercial practice in developing countries which is already prominent in developed countries of the world. the major fish protein demand is being supplemented in developing countries is   fishing to meet the needs of the growing population. therefore, in some developing nations, the percentage of animal protein from fish in the diet can be as high as 20 percent.

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.