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Q. In arthropods why isn't gas exchange done through cutaneous diffusion?
In arthropods the impermeability of the exoskeleton makes the way of gases difficult. In addition the new methods of respiration present in arthropods were preserved by evolution because they were more capable for those animals.
1. A roan bull which is heterozygous for the polled condition is mated to several cows of identical genotype to his. How many roan, polled animals should be produced out of 16?
Which of the following terms best describes calcium metals? Check all that apply. Molecule, element, matter, and compound.
What is meant by "post-translational modification"? Give examples of post-translational modifications of the following amino acids: a. Serine b. Lysine C. Choose a third amino acid
Q What are the major cells of which poriferans are made? Sponges have their external wall covered by flat cells called pinacocytes and having pores well-delimited by special ce
Lungs - Respiration Lungs can be simple, characterised by air exchange with surrounding environment by diffusion only. These are called the diffusion lungs and are present in
Measures to control malaria infection: Malaria is a communicable disease caused by the female anopheles mosquito. a) Controlling mosquito population : Mosquito population can b
Hygroscopic Coeflicient To have a more complete picture of soil moisture relations, let us take a soil sample and oven dry it for 24 hours at 11 o C. Now if this soil is kept i
respiration.
How is the brain involved in the immune system? A. Immune cells that constitute body's biological defense against infections and toxins, have many things in common with nerve c
what is r and k selection
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