Explain why a food web is a more accurate representation of energy flow than a food chain
What will be an ideal response?
Responses should discuss how organisms can feed at more than one trophic level instead of one level feeding exclusively on the level below it.
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In sickle cell anemia, what happens to the hemoglobin molecule that causes the red blood cell to sickle?
a. a small part of it becomes hydrophobic b. a small part of it becomes hydrophilic c. a small part of it becomes polar d. a small part of it becomes negatively charged e. a small part of it becomes positively charged
__________ is a form of genetic exchange in bacteria that involves contact between two cells
a. Transformation b. Transduction c. Conjugation d. Binary fission e. Budding
The average human body at rest burns about ________ Calories per hour
A) 500 B) 5,000 C) 70 D) 1,000 E) 1
Thalidomide is a chemical that was prescribed as a sedative in the early 1960s. Many women who took the drug during their first trimester gave birth to children with arm and leg deformities. What developmental process did this drug affect?
A) early cleavage divisions B) determination of the polarity of the zygote C) differentiation of bone tissue D) morphogenesis E) organogenesis