« previous next »

Author Question: A botanist discovers a plant that lacks the ability to form starch grains in roo (Read 960 times)

xclash

  • Hero Member
  • *****
  • Posts: 681
on: Aug 16, 2013
A botanist discovers a plant that lacks the ability to form starch grains in root cells, yet the roots still grow downward. This evidence refutes the long-standing hypothesis that
A) falling statoliths trigger gravitropism.
B) starch accumulation triggers the negative phototropic response of roots.
C) starch grains block the acid growth response in roots.
D) starch is converted to auxin, which causes the downward bending in roots.
E) starch and downward movement are necessary for thigmotropism.


clippers!

  • Hero Member
  • *****
  • Posts: 828
Reply #1 on: Aug 20, 2013
I chose A and got the answer, hope that helps.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Did you know?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

Did you know?

Though newer “smart” infusion pumps are increasingly becoming more sophisticated, they cannot prevent all programming and administration errors. Health care professionals that use smart infusion pumps must still practice the rights of medication administration and have other professionals double-check all high-risk infusions.

Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Plant shoots have a modular organization. Plant shoots have a modular organization.
Seasonal changes in biomass and growth form of benthic algae in the Eel River, California: (a) in ea Seasonal changes in biomass and growth form of benthic algae in the Eel River, California: (a) in ea
Example of Truth in Lending form. Example of Truth in Lending form.
The I-9 form Cont The I-9 form Cont
Seven bacteriophage deletion mutations (1 to 7 in the table below) are tested for their ability ... Seven bacteriophage deletion mutations (1 to 7 in the table below) are tested for their ability ...
The B-form DNA double helix The B-form DNA double helix
Video: Inflammation Animation

For a complete list of videos, visit our video library