Through studies using the animal cap assay this morphogen was shown to be important for the determination of the different types of mesoderm tissue in the developing embryo.
A. activin
B. noggin
C. Spemann's organizer
D. Hox gene
E. cadherins
A. activin
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Which is the correct horizontal pathway of water from the soil to the center of the root?
a. epidermis ? root hair ? cortex ? pericycle ? endodermis ? xylem b. epidermis ? cortex ? pericycle ? endodermis ? phloem ? xylem c. root hair ? epidermis ? cortex ? endodermis ? pericycle ? xylem d. root hair ? cortex ? endodermis ? pericycle ? epidermis ? xylem e. root hair ? epidermis ? endodermis ? cortex ? xylem ? phloem
Which of the following showed their greatest diversity during the Mesozoic era, but were a small, less diverse group during the Paleozoic era?
A) gymnosperms B) fungi C) flowering plants D) mammals
Which of the following is an example of homeostatic failure?
A) A pH balance of 7.37 with a respiratory rate of 28 breaths/min B) Severe vomiting and diarrhea and a heart rate of 120 beats/min C) Salt and water retention and a blood pressure of 170/98 mm Hg D) Core body temperature of 98.2°F and an ambient temperature of 28°F
When a T cell's CD95L binds to the CD95 on a target cell, antibodies are formed
Indicate whether the statement is true or false