Which features of companion cells are essential to their function?
1 They are connected by plasmadesmata to the sieve tube elements.
2 They have a thinner cell wall than a sieve tube element.
3 They contain a nucleus and mitochondria.
1 )
1, 2 and 3
2 )
1 and 2 only
1 and 3 only
4 )
2 and 3 only
تحلیل ویدئویی تست
تحلیل ویدئویی برای این تست ثبت نشده است!
پرسش و پاسخ های مشابه
سوال کنید یا به سوالات دیگران پاسخ دهید ...