LH and FSH by posterior pituitary while act on mature follicles to undergo ovulation. Estrogen and progesterone by ovaries and act on many things.
A phylogenetic tree is the representation of the evolutionary relationships among species. The fossil records are used as evidence to develop a phylogenetic tree. Thus, option A is correct.
<h3>What is a fossil record?</h3>
A fossil record is a depiction of the organisms that shared common ancestors and depicts the change in the structural and functional unit of the organism over many years of time.
They are used to illustrate the phylogenetic tree to show the morphological, structural, chemical, anatomical, etc variations in species that shared ancestry.
Therefore, option A. fossil records are used to show the common ancestry at the nodes.
Learn more about fossil records here:
brainly.com/question/3637110
#SPJ1
Sometimes the Earthquake can contaminate the drinking water of a lower developed city/town which leaves the residents with no reliable and clean water source.
Well sickle cell disease requires two homozygous recessive alleles so you would have the disease but if your'e heterozygous you have the sickle cell trait.