What is the chemical in tobacco smoke that's able to activate the brain's reward pathways, thus making smoking a very addictive process?
What will be an ideal response?
nicotine
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To reproduce, many plants produce seeds-structures containing embryonic offspring along with nutrients inside a tough case. These offspring develop after being released by the parent plant
To which animal reproductive strategy is seed production most comparable? A) oviparous reproduction B) ovoviviparous reproduction C) viviparous reproduction
A bloodstream infection with ____________________ could result in the release of endotoxin into the bloodstream.
A) Clostridium difficile or Clostridium perfringens B) Neisseria gonorrhoeae or Escherichia coli C) Staphylococcus aureus or Mycobacterium tuberculosis D) Staphylococcus aureus or Streptococcus pyogenes
As cleavage divisions continue, the ball or layer hollows out to form the ____
a. morula b. zygote c. blastomere d. blastula e. gastrula
Bacterial cells with capsules are resistant to killing by phagocytes
Indicate whether the statement is true or false