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

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

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

Protostomes are animals in which the embryonic blastopore becomes theMultiple choice question.anusmesodermmouthectoderm

Multiple Choice QuestionThe structures that merge to form an enlarged chamber called the renal pelvis are ______.Multiple choice question.medullasnephronscalyces

Multiple Choice QuestionThe renal pelvis is embedded and surrounded by the renal ______.Multiple choice question.nephronscalycessinus