Question

1.Embryonic development corresponds to the evolution of specific adaptations and structures in the various phyla. In animals development for example the notochord in embryonic development later develops into structures in the adult animal. The presence of the notochord evolutionarily is present in ______________ .

deuterostomes

protostomes

bilaterians

echinoderms

chordates

2.Metazoans are distinguished by the presence of _____________ and which are typical in all animal EXCEPT the phylum ______________.

bilateral symmetry; cnidarians

true tissues; Porifera

ciliated cells in larva for feeding; lophotrochozoa

radial symmetry; echinoderms

3.Relating embryonic development in plants to animals, the gametophyte of an angiosperm is most like a(n) _______________ .

placental mammal

amphibian

monotreme

4.In development, the process by which a cell takes on the specific role and characteristics of and structures is called

activation

pluripotency

differentiation

fertilization

Answer 1

1. Chordates

Presence of dorsal notochord between the nervous system and the digestive system is a characteristic feature of chordates.

2. true tissues; Porifera

Metazoans are characterised by the presence of true tissues and all animal phyla are metazoans except Porifera. Porifera have cellular level of organisation.

3. Placental mammal

The gametophyte of angiosperms is completely dependent on the sporophyte for the development just like foetus is dependent on the mother's  body for the development in placental mammals.

4. Differentiation

Differentiation is the process by which unspecialised cells take on the specific role and characteristics.