In which of the following cases is energy NOT needed for transmembrane transport?

a. Lysine moves into the cell against its concentration gradient via the Na+/lysine symporter.

b. Potassium ions (K+) move out of the cell down the K+ concentration gradient via potassium channels.

c. Glucose moves into the cell down its concentration gradient via a glucose uniporter.

d. Sodium ions (Na+) move out of the cell down the Na+ concentration gradient via sodium channels.

Which of the following are correct?

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#Question id: 5085

#Unit 5. Developmental Biology

An embryo with meroblastic cleavage, extraembryonic membranes, and a primitive streak must be that of ________.

TLS Online TPP Program

#Question id: 5086

#Unit 5. Developmental Biology

Cells move to new positions as an embryo establishes its three germ tissue layers during ________.

TLS Online TPP Program

#Question id: 5087

#Unit 5. Developmental Biology

The outer-to-inner sequence of tissue layers in a post-gastrulation vertebrate embryo is ________.

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#Question id: 5088

#Unit 5. Developmental Biology

 If gastrulation was blocked by an environmental toxin, then ________.

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#Question id: 5089

#Unit 5. Developmental Biology

The archenteron of the developing sea urchin eventually develops into the ________.

TLS Online TPP Program

#Question id: 5090

#Unit 5. Developmental Biology

Which of the following is a correct description of the fate of the germ layers?