« previous next »

Author Question: Movement of phloem sap from a source to a sink A) occurs through the apoplast of (Read 730 times)

Hungry!

  • Hero Member
  • *****
  • Posts: 1,071
on: Aug 13, 2013
Movement of phloem sap from a source to a sink
A) occurs through the apoplast of sieve-tube elements.
B) depends ultimately on the activity of proton pumps.
C) depends on tension, or negative pressure potential.
D) depends on pumping water into sieve tubes at the source.
E) results mainly from diffusion.


curlz

  • Hero Member
  • *****
  • Posts: 538
Reply #1 on: Aug 30, 2013
Pick B, i got it right :P


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

Breast cancer. Notice the tumor growing within a lactiferous gland, which occurs in infiltrating duc Breast cancer. Notice the tumor growing within a lactiferous gland, which occurs in infiltrating duc
Movement on Faults Causes Earthquakes Movement on Faults Causes Earthquakes
Add movement to skin lifting by gently pulling it in a certain direction (e.g., up and forward) to ... Add movement to skin lifting by gently pulling it in a certain direction (e.g., up and forward) to ...
Circling the forearm to create movement at the elbow. Circling the forearm to create movement at the elbow.
Apply the heat source, and ask for immediate feedback on the heat intensity felt by the recipient. ... Apply the heat source, and ask for immediate feedback on the heat intensity felt by the recipient. ...
Biosynthesis of methionine and threonine from homoserine, as it occurs in plants and bacteria Biosynthesis of methionine and threonine from homoserine, as it occurs in plants and bacteria
Video: Digestive chemicals - types & enzymes

For a complete list of videos, visit our video library