Mature sieve elements external view, showing sieve plates. The pores in the sieve plates between the sieve tube elements are open channels, what is the relevance of this open pores in the sieve plates?

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#Question id: 5786

#Unit 8. Inheritance Biology

A mutation causing an abnormality in presenilin that disrupts amyloid production or function has been associated with

TLS Online TPP Program

#Question id: 20982

#Unit 12. Applied Biology

Which is considered as the most recalcitrant of the BTEX compounds, and of greatest regulatory concern because of its associated health impacts?

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#Question id: 5261

#Unit 8. Inheritance Biology

Which of these statements about prokaryotes is correct?

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#Question id: 8696

#Unit 9. Diversity of Life Forms

There is some evidence that reptiles called cynodonts may have had whisker-like hairs around their mouths. If true, then hair is a shared ________.

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#Question id: 726

#Unit 1. Molecules and their Interaction Relevant to Biology

The structure of a protein is known from X-ray diffraction studies which gave 30% - helix, 50% -sheet and 20% random coil. Circular dichroism (CD) measurements gave 50% -helix, 40% -sheet and 10% random coil. What could not be a possible explanation for these observations.