The letter “A” in the above figure represents
a. pericycle
b. endodermis
c. primary xylem
d. root cortex
e. primary phloem
Answer: d
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A. True B. False
Oxytocin is secreted by the posterior pituitary in females only
Indicate whether the statement is true or false.
How did researchers establish the connection between chimpanzees and humans?
What will be an ideal response?
Marsupials are a very ancestral form of mammal, evolving before placental mammals over 70 million years ago. Today Australian marsupials can be compared to placental mammals on other continents.
It could be said that today's Australian marsupials and today's placental mammals have
A. undergone convergent evolution. B. undergone divergent evolution. C. undergone selective advantage. D. developed homologous structures. E. undergone heterozygote advantage.