The tissue type that covers internal and external surfaces of organs, aids in protection, nutrition absorption, and gas diffusion is the _______ tissue.
A. connective
B. nervous
C. muscle
D. epithelial
E. All of the answer choices are correct.
D. epithelial
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Which of the following type of organism is most likely an autotroph?
A. caribou B. lion C. human D. tree E. parasite
Four of the five hormones listed below affect blood
glucose level. Select the exception. a. calcitonin b. glucagon c. glucocorticoid d. insulin e. epinephrine
The decrease of carbon-12 in a fossil indicates the age of that fossil
__________________ Indicate whether the statement is true or false.
How were conditions on the early Earth of more than three billion years ago different from those on today's Earth? Unlike Earth today, early Earth _____
A) had an atmosphere rich in gases released from volcanic eruptions B) had an oxidizing atmosphere C) experienced little high energy radiation from the sun D) had an atmosphere with significant quantities of ozone