Plant cells called ____ form flexible support strands such as the "strings" in celery
a. sclerenchyma
b. tracheids
c. collenchyma
d. parenchyma
e. vessel members
C
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For each statement, indicate whether it is True or False. If you choose False, briefly explain why the statement is incorrect. True or false. Organisms higher in a food web eat everything that is lower in the food web
What will be an ideal response?
Activation of the IFN-? globin promoter is an example of a histone code. Of the steps listed, which would be the last step?
A. exposure of the TATA box in promoter B. acetylation of nucleosomes C. transport of the nucleosome D. methylation of nucleosomes E. phosphorylation of nucleosomes
In a mammal that you are studying, blood sodium levels are decreasing sharply. To correct this problem, which hormone might you try to administer?
A. cortisol B. aldosterone C. estrogen D. antidiuretic hormone E. testosterone
A population with small changes in allele frequencies is called
A. natural selection. B. adaptation. C. microevolution. D. convergent evolution. E. fitness.