The answer is D. An experiment in which the outcome is repeatable.
-Not completely understood, share echinoderm and chordate characteristics
-Chordates/them have pharnygeal slits
-Ambulacraria hypothesis unites echinoderms and hemichordates on the basis of a shared diffuse epidermal nervous system
-Shared tripartite coelom in hemichordates/echinoderms
-Buccal diverticulum now believed to be a synapomorphy of hemichordates only
-Early embryogenesis of hemichordates similar to echinoderms
-Tornaria larva almost identical to bipinnaria larva, suggesting that hemichordates/echinoderms are sister groups
<span>-Sequence analysis of the gene encoding the small subunit of rRNA supports a deuterostome clade</span>
Yolks are an important component of the eggs since they
nourish the young embryo as it develops into a young juvenile organism. The
yolk is important especially when the embryo is not attached to its parent (in
oviparous organisms) like in humans. Humans embryos are able to get their
nourishment directly from their mothers in the womb (through the placenta)
hence don’t require a yolk (viviparous organisms).
Evaporative cooler are primarily used in climate where the summer are hot and dry
The evaporative cooler help to keep the home cool and comfortable during warm month example during hot and dry climatic condition. The evaporative cooler device cool air throught the evaporation of water. This device differ from typical air condition system which uses vapor compression or absorption refrigeration.