Which one of the following is the most abundant protein in the animals?

In frog, the Renal portal system is a special venous connection that acts to link :

What is the name of the blood vessel that carries deoxygenated blood from the body to the heart in a frog?

Which of the following statement is correct about location of the male frog copulatory pad?

Match List I with List II : \begin{array}{|l|l|l|l|}\hline & List - I & & List - II \\\hline A. & Squamous Epithelium & I. & Goblet cells of alimentary canal \\\hline B. & Ciliated Epithelium & II. & Inner lining of pancreatic ducts \\\hline C. & Glandular Epithelium & III. & Walls of blood vessels \\\hline D. & Compound Epithelium & IV. & Inner surface of Fallopian tubes \\\hline\end{array} Choose the correct answer from the options given below :

In both sexes of cockroach, a pair of jointed filamentous structures called anal cerci are present on