Chlorosis, stunted growth with yellowing and

death of young leaves, is caused by a
deficiency of
a. nitrogen.
b. zinc.
c. magnesium.
d. iron.
e. any of these.


A

Biology & Microbiology

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The ability to determine an object's location using high frequency sound waves is exhibited by

_____ amphibians underwater. _____ bats flying in darkness. _____ whales and dolphins at sea. _____ owls hunting at night.

Biology & Microbiology

Characters that provide evidence for evolutionary relationships based on shared ancestry are called ____

a. homologous b. analogous c. taxonomic d. convergent e. exaptations

Biology & Microbiology

Why are epithelial membranes not very thick?

A. Epithelial tissues can only reach a certain thickness because their growth is constrained by microtubules inside the cell membrane. B. Thick epithelial tissues would collapse due to the drying effect of the environment. C. Epithelial tissues are programmed to stop dividing after only a few cell cycles. D. Epithelial tissues are required to support other cells growing on top of the tissue. E. Epithelial tissues play a critical role in transport and must be thin to allow diffusion to occur.

Biology & Microbiology

If a DNA sequence reads TTGCGATCG, what mRNA will it encode?

A) AACGCUAGC B) TTGCGUTCG C) UUCGCTUGC D) AACGCTAGC E) TTGCGATCG

Biology & Microbiology