The average adult carries 10 times more microbial cells (1014) than human cells (average about 1013).
Answer the following statement true (T) or false (F)
True
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Which of the following best describes the neuroendocrine-to-endocrine pathway of hormone action?
A) A neural organ that produces hormones regulates another gland through the release of hormones into the circulation that travel to the affected gland. B) A neural organ that produces hormones releases its hormones directly into another gland that it regulates. C) A gland releases hormones directly into a neural structure, thus regulating neural functions. D) A gland exhibits negative feedback on the nervous system by releasing hormones into neural tissue both directly and indirectly through the circulation .
Which of the following best describes the presence of gill structures in vertebrate embryos and tail structures in embryos in the great apes?
a. These are vestigial structures that are residual parts from a past common ancestor. b. These structures continue to be necessary for survival in the adult form of these organisms. c. These structures show that these species have been isolated since the separation of the supercontinent Gondwana. d. Vertebrate organisms are more closely related to fish than to marsupials.
Forward and reverse mutation can create a ________, given a sufficient number of generations and the absence of other evolutionary processes
Fill in the blank(s) with correct word
An oncologist (a physician who specializes in cancer) compares two biopsy samples by looking at the percentage of cells in mitosis. Sample 1 has 15% of cells in mitosis, and sample 2 has 8% of cells in mitosis
These samples are of the same tissue type. Which sample is likely to be cancerous, and why? Why is it important that the two samples being compared came from the same tissue type?