We know that invertebrates colonized the land before vertebrates did. What is a possible reason for this? Did things have to happen this way?
What will be an ideal response?
This probably did have to happen. The trivial reason is that the invertebrates provided food for the vertebrates, but a more basic reason is that a complex terrestrial ecosystem requires invertebrates to eat the dead and dying plant material and to return the nutrients to the soil.
You might also like to view...
How do sex hormones affect bone growth?
A) Testosterone stimulates osteoclast activity. B) They cause ossification to be faster than cartilage replacement. C) They stimulate the cleavage of hydroxyapetite. D) They cause osteoporosis. E) Estrogen causes slower epiphyseal closure.
The ________ forms the inferior portion of the nasal septum
Fill in the blank with correct word.
What is the correct order for the list of structures of the large intestine, starting at the cecum and ending at the rectum?a: Left colic flexureb: Ascending colonc: Transverse colond: Right colic flexuree: Sigmoid colonf: Descending colon
A. b, d, c, a, f, e B. b, a, c, d, f, e C. e, b, d, c, a, f D. f, c, d, e, a, b E. e, b, a, c, d, f
Leptin stimulates
A. gastrin secretion. B. release of secretin. C. the hunger sensation. D. the feeling of fullness after eating.