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Q. As animals attained larger and more complex bodies, exchanges with environment became more difficult. Explain the problems of larger bodies and the solutions that solved these problems but led to increased complexity. Think about the advances of Porifera, Cnidaria, and Platyhelminthes and include in the answer-
a. description of surface-to-volume relationships as applied to animal growth.
b. adaptations and behaviour that allowed better exchanges of oxygen and carbon dioxide.
c. structural modifications that allowed better processing and distribution of food.
d. advantages and disadvantages of mesoderm, the need of modifications for the elimination of nitrogenous waste, and a description of protonephridial function.
Cyanobacteria grow prolifically in streams and lakes with low oxygen levels and high nutrient concentrations. How may the presence or absence of cyanobacteria be used as an index of pollution in lakes.
What combination(s) of chromosomes are possible in haploid cells following both divisions of meiosis? (Hint: remember independent assortment). A diploid cell contains three pairs of homologous chromosomes designated C1 and C2, M1 and M2, and S1 and S..
What are genotypes of all the individuals mentioned in this difficulty. What is the point of the agar dish not treated with X-gal.
How many dissimilar types of gametes can be produced. how much of drug will stay 6 hours after its administration.
How, at what time the shoot tip touched the other plant's stem did the shoot switch from growing straight to growing in a spiral? Write down a hypothesis first.
What is the most common agent of UTIs . The pool regularly becomes infested with disease-causing viruses and bacteria. Which species are more possible to thrive in the changing environment.
A middle-aged man comes in since he has noticed multiple small, blood-red, raised lesions over his anterior chest and abdomen for past numerous months. They are not painful and he has not known about any bleeding or bruising. He is concerned this mig..
What kind of approach is this alien taking to learn about the car? An alien from a new planet landed on earth. He is attentive by cars and is determined to figure out how they work.
Batch and continuous sterilisation
What is estimated density of firs in the forest. Why then is the gene called Dorsal, and not, for instance, Ventral.
What is BOD and how is it determined. Dr. Haxton told one of his students, "To move in the bloodstream, fats need the help of phospholipids." What will a good student say.
In humans, oogenesis in comparison to spermatogenesis is different in that. cytokinesis is unequal during the meiotic divisions.
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