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A sieve element of a type present in angiosperms, a series of which are joined end to end to form sieve tubes, with sieve plates between the elements.
- ‘Strands of cytoplasm called plasmodesmata connect the sieve tube element and companion cell.’
- ‘The protoplasts of adjacent sieve tube elements are interconnected through the sieve plates.’
- ‘The active transport causes an osmotic pressure within the sieve tube elements that is about twice as high as that of the surrounding cells of the vascular bundle's sheath.’
- ‘We found that there was a direct relationship between vigor and the size of sieve tube elements in wood of old trees, but no correlation was found in young trees.’
- ‘Other cell types classified as vascular tissue, such as sieve tube elements and companion cells, did not conduct light efficiently in either stems or roots.’
We take a look at several popular, though confusing, punctuation marks.
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The definitions of ‘buddy’ and ‘bro’ in the OED have recently been revised. We explore their history and increase in popularity.