Biological adaptation, Biology

Assignment Help:

Biological Adaptation

These adaptations depend on the geology and basic fertility of the region and some of the mechanisms that are especially well developed in tropical rain forests are:

  • Root mats consisting of many fine feeder roots which penetrate the surface of the litter and quickly recover nutrients from leaf fall and rain before they are leached away. Root mats also inhibit the activity of denitrifying bacteria, thus preventing loss of nitrogen.
  • Mycorrhizal fungi associated with root systems act as nutrient traps and help in the recovery and retention-of nutrients. This symbiosis is also present in temperate forests of areas that are basically poor in nutrients.
  • Evergreen leaves have thick waxy cuticles that retard loss of water and nutrients, also leaves have pointed tips or 'drip tips' that drain off water fast, thereby reducing leaching of leaf nutrients.
  • Algae and lichens that cover surfaces of many leaves pick up nutrients from rainfall some of which becomes available to the leaves immediately. Lichens also fix nitrogen.
  • Thick bark inhibits diffusion of nutrients out from the phloem and subsequent loss by stem flow i.e., rain running down the trunks of trees.

Related Discussions:- Biological adaptation

Incomplete dominance (1:2:1), INCOMPLETE DOMINANCE (1:2:1) Sometimes tw...

INCOMPLETE DOMINANCE (1:2:1) Sometimes two genes of allelomorphic pair do not show dominant-recessive relationship, but when present simultaneously (or come together), they sho

Mountain forest ecosystem as life support systems, Mountains and their fore...

Mountains and their forest ecosystems are regarded as the water towers of the world. A good example is the extraordinarily massive Himalayan Mountains which have shaped the climate

What will happen to membranes, What might happen to membranes if many -OH g...

What might happen to membranes if many -OH groups were added to the tails of phospholipids?

Lower calorific value (lcv) or net calorific value (ncv), It is defined as ...

It is defined as the amount of heat liberated when one unit mass of fuel is burnt and the products of combustion are allowed to escape.                                  LCV = HC

What are the phases to atherosclerosis, Q. What are the phases to atheroscl...

Q. What are the phases to atherosclerosis? There are five phases to atherosclerosis: Phase I: Asymptomaticphase, consists of fatly streaks which are non-obstructive, lipi

Flowering and endogenous rhythms, Flowering and Endogenous Rhythms Th...

Flowering and Endogenous Rhythms The last four decades of studies in animals and plant physiology have clearly established the existence of a biological clock mechanism to me

Effect of somatostatin for the pancreatic hormonal secretion, Q. What are t...

Q. What are the effects of somatostatin for the pancreatic hormonal secretion? Somatostatin inhibits both glucagon and insulin secretions.

Distinguish, distinguish between striated and cardic muscles

distinguish between striated and cardic muscles

Explain the potential benefits of micro nutrients, Explain the Potential Be...

Explain the Potential Benefits of micro nutrients? The potential benefits of micro nutrients should also be taken into account when the nutrient allowances are defined for olde

What are the applications of pcr, Polymerase chain reaction already has ext...

Polymerase chain reaction already has extremely widespread applications and new uses are being devised on a regular basis. Some and definitely not all of the applications are given

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd