What is a sieve tube element?

a. the sugar- conducting cell found in phloem
b. the widened, perforation-contains, water- conducting cell found only in angiosperms
c. the nutrient - and water- absorbing cell found in root hairs
d. the nucleated and organelle - rich support cell found in phloem

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the

The answer is a. i hope this