How do sieve tube member (stm) cells differ from tracheids? stm cells function as living cells; tracheids function as dead cells stm cells lack a companion cell; tracheids have a companion cell stm cells occur in angiosperms; tracheids only occur in gymnosperms stm cells have secondary cell walls; tracheids?
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Advances in technology have enabled scientists and researchers to better study the evolutionary relationships between species
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There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.
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Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled
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How do sieve tube member (stm) cells differ from tracheids? stm cells function as living cells; tr...
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