Biology Test 140

The condition in which the tissues of the body are stained with bile pigments is known as icterus or jaundice. On account of the characteristic pigmentation and the appearance of bile pigments in the blood and in the urine the disease was recognized at an early date.

Hence, the correct option is (D).

Involuntary action is the set of muscle movement which do not require thinking. But it is controlled by the brain for example beating heartbeat. While on the other hand, the reflex action is rapid and spontaneous action in response to any stimulus which doesn't involve the brain.

Hence, the correct option is (A).

The seeds of monocotyledonous plants have only one cotyledon. In the family Poaceae (e.g., wheat, maize etc.), this cotyledon is called scutellum, situated towards the lateral side of the embryonal axis. It provides nourishment to the developing embryo.

Hence, the correct option is (D).

The seminiferous tubules are lined by a complex stratified epithelium containing two distinct populations of cells, spermatogenic cells, that develop into spermatozoa, and Sertoli cells which have a supportive and nutrient function.

Hence, the correct option is (C).

Parenchyma is the first tissue developed during the course of evolution hence, phylogenetic ally most primitive also functionally, it is most primitive as it is involved in photosynthesis and storage of food material.

Hence, the correct option is (A).

In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

The simplest situation of dominant and recessive alleles is if one allele makes a broken protein. When this happens, the working protein is usually dominant. The broken protein doesn't do anything, so the working protein wins out.
Hence, the correct option is (B).

Blue-green algae is also called Cyanobacteria, is a large group of prokaryotic organisms that resemble the eukaryotic algae in morphological and ecological characteristics, and were at one time treated as algae, hence the common name of blue-green algae. The prokaryotic nature of the blue-green algae has been the reason for these to be classified in the prokaryotic kingdom Monera.

Hence, the correct option is (B).

Ecological succession, the process by which the structure of a biological community evolves over time. Two different types of succession, primary and secondary, have been distinguished. Primary succession occurs in essentially lifeless areas, regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. Secondary succession occurs in areas where a community that previously existed has been removed; it is typified by smaller-scale disturbances that do not eliminate all life and nutrients from the environment.

Hence, the correct option is (C).

Cryptochromes are a class of flavoproteins that are sensitive to blue light. They are found in plants and animals. Cryptochromes are involved in the circadian rhythms of plants and animals, and possibly also in the sensing of magnetic fields in a number of species.
Hence, the correct option is (B).

Batesian mimicry is a type of defensive behavior in which a palatable species closely resembles unpalatable or toxic species to avoid predation. Early experiments suggested that the viceroys use Batesian mimicry to defend themselves against predators.
Hence, the correct option is (C).