Fetal hemoglobin carries ________ percent more oxygen than adult hemoglobin.
A) 5 to 10
B) 20 to 30
C) 50 to 60
D) 80 to 90
B) 20 to 30
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Which vessel, A, B, C, or D, carries blood to the human lungs?
1.A
2.B
3.C
4.D
On human chromosome 11 there is a gene called DRD4. This gene carries the instructions for building a protein that is receptor for the brain chemical dopamine. There are two different alleles, C and T. Subjects in a study (with known DRD4 genotypes) responded to a questionnaire on temperament and character. Based on the graph shown above, what conclusion might you draw about an individual with two C alleles?
What will be an ideal response?
Identify the two systems that work together to control our internal organs.
A. endocrine system B. integumentary system C. nervous system D. cardiovascular system
Use your knowledge of photosynthesis and cellular respiration to explain why maintaining a healthy greenhouse is necessary for the long-term survival of the Mars Colony.
Also explain why the humans are just as crucial to the greenhouse.