Microorganisms contribute to the formation of soils
Indicate whether the statement is true or false
TRUE
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It appears that eukaryotic diversity took off around 800 million years ago. Which of the following is thought to be responsible for this?
A. By 800 million years ago, enough time had passed since the arrival of eukaryotes for evolutionary adaptation to take place. B. Eukaryotic organisms first arrived 800 million years ago, so when they did, they quickly diversified. C. Chloroplasts first arrived 800 million years ago. D. Environmental conditions changed 800 million years ago, namely an increase in oxygen and a decrease in sulfide. E. All of the answer options are correct.
According to the concept of ___________, species evolve continuously over long spans of time.
Fill in the blank(s) with the appropriate word(s).
Clostridium botulinum produces a deadly toxin that stops muscle contractions by ____
a. destroying cell membranes b. killing mitochondria c. disrupting the structure of actin filaments d. preventing ATP synthesis e. blocking acetylcholine release
Which of the following statements about Type II diabetes is true?
a) It is the most prevalent form of diabetes in the US b) It is caused by too few insulin producing cells in the pancreas c) It can cause blindness d) Both a and c are true e) Both b and c are true