If gastrulation failed to occur, which of the following structures would not be formed?
A. ectoderm
B. blastocyst
C. inner cell mass
D. epiblast
E. All of the answer options are correct.
A
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Respiration in adult terrestrial insects is achieved by way of:
A. gills B. tracheae C. book lungs D. passage of respiratory gases through the cuticle E. Malphigian tubules
In biology lab, you observe lumps of plant tissue. Your instructor tells you that they have been grown artificially and can produce new plants. Each lump is a(n)
A. scion. B. stigma. C. tetraploid zygote. D. callus. E. amnion.
The photosynthetic bacteria that form the basis of the food chain in the Great Salt Lake are classified as
A) carnivores. B) herbivores. C) secondary consumers. D) omnivores. E) producers.
Identify all of the potential energy sources for prebiotic chemical reactions in this picture
What will be an ideal response?