What are the problems regarding terrestrial environment, Biology

Assignment Help:

Q. What are the problems that vertebrates needed to solve to adapt to the terrestrial environment since they came from the aquatic habitat? How evolution does solve those problems?

The main problems vertebrates coming from water needed to solve to adapt to the terrestrial environment were the following: the problem of elimination of wastes in a medium where water is less available, the problem of protection against nocent solar radiation, the problem to avoid dehydration, the problem of gamete locomotion in the environment for fecundation, the problem of gas exchange, earlier done by direct contact of water with gills, the problem of body support, since it was water that played this role in fishes.

Solutions for the dehydration problem: thicker and impermeable skin, permeable and moist skin or to lose less water like in amphibians. Solution for the excretion problem: excretion of urea also excreted by uric acid or chondrichthyes, substances that need less water to be dissolved. Solutions for the problem of protection against radiation: skin pigments that filter harmful radiation, feathers, carapaces or hair. Solution for the gamete movement problem: internal fecundation except for most amphibians that have external fecundation. Solution for the gas exchange problem: appearing of lungs and airways. Solution for the body support problem: further development of bony and muscular structures, like claws and limbs.


Related Discussions:- What are the problems regarding terrestrial environment

Define water distribution and compartments of body water, Define Water Dist...

Define Water Distribution and Compartments of Body Water? Each one of us has a veritable 'sea within', held in place by multiple membranes and our protective envelope of skin.

Method of purchasing a service, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Identify the hormones produced by the anterior, Identify the hormones produ...

Identify the hormones produced by the anterior and posterior lobes of the pituitary gland and specify the functions of those hormones.

Discuss the following term in brief - adaptive radiation, Discuss the follo...

Discuss the following term in brief - Adaptive  radiation Evolution of a variety of different species from a single common ancestor. Each is adapted for a particular niche, and

Computed tomography, C omp uted tomography: Computed tomogr...

C omp uted tomography: Computed tomography (CT imaging) is also known as CAT (computed axial tomography) scanning and it is based on the X-ray principle. The CAT sc

Taxonomy, what is the taxonomic classification for the protist Archaeplasti...

what is the taxonomic classification for the protist Archaeplastida?

Compare the time-course to the rising phase, Assume you are injecting a sub...

Assume you are injecting a sub threshold depolarizing current step into a neuron. Draw the corresponding membrane voltage response; be sure to indicate the shape of the voltage cha

Admission procedure - nursing, Admission Procedure   From the time  the...

Admission Procedure   From the time  the child and his family enter the hospital doors, the admission procedure should be carried out in a friendly and efficient manner. Admiss

Why is it true that of the 28 chromosomes in an ovum, A species has a diplo...

A species has a diploid chromosome number of 56, WHY is it true that of the 28 chromosomes in an ovum, 14 are always paternal?

Explain metabolism of iron, Explain Metabolism of Iron? In this sub-sec...

Explain Metabolism of Iron? In this sub-section, we will study how body gets its iron supply, how iron is transported and utilized by the various tissues and how iron balance i

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