Biology Test 135

Hence, the correct option is (A).

The anatomy of the penis varies widely according to species. However, the penis evolved only once in the evolutionary history of amniotes. In male caecilians, the intromittent organ is called the phallodeum.
Hence, the correct option is (D).

Haemophilus ducreyi is the causative agent of chancroid, one of the genital ulcerative diseases. Haemophilus ducreyi is the major cause of genital ulcer disease in Africa and Southeast Asia and is of increasing concern in the United States.
Hence, the correct option is (D).

Succinate dehydrogenase is the only enzyme of Krebs' cycle which is located in inner mitochondrial membrane in eukaryotes and in cytosol in prokaryotes while all other enzymes of this cycle are located in the mitochondrial matrix.

Hence, the correct option is (D).

Mexico's International Wheat and Maize Improvement Center says it has produced a new ''wonder wheat'' yielding 50 percent more grain per acre than any wheat variety in history. The center is part of the international agricultural research network for the Third World, the Consultative Group on Agricultural Research.

Hence, the correct option is (A).

Since trophectoderm cells are extra-embryonic tissue, they do not become part of the fetus but do become part of supporting structures, such as the placenta and membranes. Instead of removing individual blastomeres, several trophectoderm cells are removed.

Hence, the correct option is (A).

The segmentation of the pharyngeal endoderm has also been key to the evolution of pharyngeal metamerism. It is likely that endodermal segmentation is a deuterostome characteristic and that this basic pattern was sequentially modified and over time the more complex pharyngeal metamere of vertebrates emerged.
Hence, the correct option is (C).

The Rhizobium bacteria present in the root nodule of leguminous plants fix the atmospheric nitrogen by an oxygen labile enzyme nitrogenase. The root nodules contain a pigment called leghaemoglobin which prevents the exposure of nitrogenase to oxygen.
Hence, the correct option is (D).

Reproductive health refers to total well-being in all aspects of reproduction, i.e., physical, emotional, behavioral, and social. Our nation was the first nation in the world to initiate various action plans at the national level towards attaining a reproductively healthy society. An overall improvement in reproductive health has taken place in our country as indicated by reduced maternal and infant mortality rates, early detection and cure of STDs, assistance to infertile couples, etc. Improved health facilities and better living conditions promoted an explosive growth of the population.

Hence, the correct option is (D).

The wild cabbage is a good example to prove that Entirety different-looking organisms can evolve from the same organism by the process of evolution. The only difference is that we are using an artificial selection of evolution instead of natural selection.

The farmers have been cultivating Wild cabbage as a food plant for thousands of years ago and have produced entirely different looking vegetables like cabbage, broccoli, cauliflower, kohlrabi , and kale from it by artificial selection.

The farmers Done It as follows-

Some Farmers wanted to have a very short distance between the leaves of wild cabbage and produced a common variety of cabbage.

When farmers opted for the arrested flower development of wild cabbage plant, it leads to the production of another variety of cabbage called, ''Broccoli''.
Hence, the correct option is (A).