Analysis of the nutrient content of phloem is performed on phloem sap that is made available when an aphid is cut away from its stylet.
Answer the following statement true (T) or false (F)
True
It is true that the analysis of the nutrient content of phloem is performed on phloem sap that is made available when an aphid is cut away from its stylet. This is the easiest way to access the sap.
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Which of the following was a challenge to the survival of the first land plants?
A) too much sunlight B) a shortage of carbon dioxide C) desiccation D) animal predation
In general, the blastomeres of this region form the ectodermal tissues.
A. animal pole B. vegetal pole C. equator region D. membrane
Which statement is true of polytomy branches?
a. Organisms in each branch share a common ancestor. b. Polytomy represent mass speciation from a single mutation event. c. The longest branch is the ancestor of the other sister taxa. d. Polytomy branching only occurs in single-celled organisms.
The sequence Lys-Asp-Glu-Leu (KDEL) serves as an ER retention signal for proteins by binding to KDEL receptors that
a. hold the proteins in the rough ER. b. hold the proteins in the smooth ER. c. hold the proteins in both smooth ER and rough ER and prevent their transport to the Golgi apparatus. d. transport the proteins from the Golgi apparatus back to the ER.