A layer of endodermal cells around the cylinder deposit a waterproof band called a __________ in
their abutting walls. Fill in the blank(s) with the appropriate word(s).
Casparian strip
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After conjugation between an F+ cell and an F- cell, does the F- cell remain as F- or does it become F+? After
conjugation between an Hfr cell and an F- cell, does the F- cell remain as F- or does it become F+? Explain each answer.
What will be an ideal response?Humans with compromised _____ systems can more easily experience disease caused by normal biota
Fill in the blank(s) with the appropriate word(s).
Homeostasis provides what kind of internal environment?
A. Positive B. Stable C. Limiting D. Changing E. Chemical and physical
Select the best process listed below for each of the following statements. Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement.
A. Homologous sets of genes ABCDEF and AEDCBF are located on homologous chromosomes. B. A small region of a protein from three species is sequenced and found to be as follows:species X is alanine, glycine, glycine, threonine, alaninespecies Y is alanine, glycine, threonine, alaninespecies Z is alanine, glycine, glycine, threonine, alanineThe difference in the amino acid sequence of species Y is most likely due to this. C. The nucleotide sequences of homologous regions of DNA of two species are AATGCCCCGTTA and AATGCCCCGCTTA. If this is not the result of a nucleotide base-pair addition, then it is most likely the result of this. D. E. Homologous sets of genes ABCDEF and aBCdEF are located on nonhomologous chromosomes. Crossing over between them is suppressed because their locations are the result of this. F. Homologous sets of genes ABCDEF and ABCDEF are located on nonhomologous chromosomes. G. A small region of a protein from three species is sequenced and found to be as follows:species X is alanine, glycine, threonine, alaninespecies Y is alanine, glycine, threonine, alaninespecies Z is alanine, valine, glycine, threonine, alanineThe difference in the amino acid sequence of species Z is most likely due to this.