Consider the possibility that we discover a gene that regulates both the amount of root hairs and where root hairs grow on a root tip. Since the surface area provided by root hairs is so critical to their uptake of water and nutrients, expanding their growth area seems a great advantage. However, which of these might be a problem?
A) Growth of root hairs in the zone of cell division would interfere with root cell proliferation.
B) Growth of root hairs in the root cap would cause them to be shredded off since this area takes substantial abrasion.
C) Growth of root hairs in the zone of elongation would cause them to be shredded off as they anchored in soil and the root lengthened.
D) All of these choices pose a problem.
D) All of these choices pose a problem.
Answers: 3
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How do you think earths interior affects what is happening on the surface? 2. how do fossils support the continental drift hypothesis? 3. how does sea- floor spreading support the hypothesis of continental drift? 4.what do scientists observe when they studied the magnetic fields of rocks on the sides of mid-ocean ridges? 5. what is a tectonic plate ? 6. explain mantle convection 7.how can movements of the continents affect earths climate? 8. what occurs during drifting?
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Consider the possibility that we discover a gene that regulates both the amount of root hairs and wh...
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