Which of the following is defined as the opening between the archenteron of an embryo and the outside?Multiple choice question.DeuterostomeBlastoporeProtostomeLophophore

Which of the following is the opening of the archenteron, the future anus in sea urchins?Multiple choice question.BlastoporeBlastocystBlastodiscBlastocoel

In most protostomes, the first indentation of the gastrula develops into the ______ and the second opening becomes the ______, while in deuterostomes the ______ is the first opening and the ______ is the second.Multiple choice question.heart; anus; anus; heartanus; mouth; mouth; anusanus; heart; heart; anusmouth; anus; anus; mouth

Extraembryonic membranes are formed from Blank______ cells located Blank______ of the body of the embryo.Multiple choice question.maternal; insideembryonic; insidematernal; outsideembryonic; outside

Of the following combination of statements about protostomes and deuterostomes, which choice is correct?Group of answer choicesProtostomes are animals in which the mouth develops from the blastopore, and the anus or anal pore develops from the second opening. Deuterostomes are animals in which the anus develops from the blastopore and the mouth develops secondarily later in their development.Protostomes are animals in which the mouth develops from the blastopore, and the anus or anal pore develops from the second opening. Deuterostomes are animals in which the mouth develops from the blastopore and the anus develops secondarily later in their development.Protostomes are animals in which the anus develops from the blastopore, and the mouth develops from the second opening. Deuterostomes are animals in which the anus develops from the blastopore and the mouth develops secondarily later in their development.Protostomes are animals in which the mouth or anus develops from the blastopore, depending on the species. Deuterostomes are animals in which the mouth and anus develops from the blastopore, depending on the species.

What is the inner membrane that encloses the embryo in fluid called?Multiple choice question.AllantoisYolk sacAmnionChorion