Each animal taxon has certain unique features. Match the following classes of animals with their unique features. 

Choose the appropriate feature for each taxon and fill in the blanks with the corresponding alphabet:

Which of the following proteins are likely to be active during mitosis? 

i. Telomerase 

ii. Primase 

iii. Topoisomerase 

iv. Kinesin 

a. ii, iii & iv only 

b. iii & iv only 

c. l, ii & ill only 

d. only iv 

 Two statements regarding evolution are made below. 

I. Rates of evolution are typically very slow because natural selection is usually ____P____ selection. 

II. The plant population growing on high-zinc-soil is able to grow at concentrations which are otherwise lethal to plants of the same species. This is _____Q_____ selection.

P and Q refer to : 

a. directional and disruptive selection respectively. 

b. stabilizing and directional selection respectively. 

c. directional selection. 

d. stabilizing selection.

Synanthropic species lives near and benefit from the association with humans and the habitats that humans create around them. Changes in bird community structure and composition along a wilderness to urbanized landscape gradient are provided below.

Based on the information provided in the graph, state whether each of the following statements is true (T) or false (F). 

a. The graph indicates a increased predation pressure on native bird species in urban ecosystem.___ 

b. The increase in total bird abundance is indicative of greater food availability in urban ecosystem as compared to wildland.___ 

c. Habitat fragmentation, forest destruction has resulted in reduced number of species in urban region.___ 

d. Bird pecies that cannot exist in unpredictable or resource poor environments are likely to flourish in urban ecosystem.___ 

e. Dominance of adopted species over resource patches in urban ecosystem can outcompete less fit native species evenness in urban ecosystem.___ 

f. Urbanization creates a novel ecosystem which attracts and stabilizes a large number of bird species from nearby ecosystems.__

In an experiment, a researcher incubated plant tissue with a bacterial strain for different time durations followed by heat treatment to specifically kill the bacteria. The plant material was analyzed ten days after each experiment for appearance of disease symptoms. Results of this study, which was done in three replicates and with appropriate controls, are tabulated below.

Which of the following statement/s is/are likely explanation/s of the above observations? 

(i) The bacterium is incapable of causing infection in the absence of heat treatment. 

(ii) Continuous contact with live bacteria is not essential to cause disease symptoms. 

(iii) The bacterium undergoes spontaneous mutations to become heat-resistant. 

(iv) Contact duration of 72 hours with live bacteria is essential to cause disease symptoms.

a. ii and iv only 

b. i, iii and iv only 

c. ii only 

d. i and iii only

Concentrations of cations & anions present in intracellular & extracellular fluids of human body are depicted in the graph.

P,Q,R and S respectively are : 

a. K⁺ ,Na⁺ , Cl^– and organic anions 

b. Proteins, bicarbonates, K⁺ and Na⁺ 

c. Mg⁺⁺ , proteins, bicarbonates and Na⁺ 

d. Ca⁺⁺ , lactate, K⁺ and Cl^–

Following are the functinal aspects of stimulation of automomous nervous system. Mark P for parasympathetic and S for sympathetic response against them.

Parasympathetic (P) or Srympathetic (S)

i. increase peristalsis in gastro intestinal tract

ii. Constriction of bronchi in lungs 

iii. Dilation of pupil

Norwegian scientists performed atcross-fostering experiment.They removed just born greattit chicks and placed them in the nests of blue-**** and vice versa. These chicks were observed till their adulthood and their pair-making behaviour was noted. The graph shows pairing success of these crossfostered birds along with non-fostered birds.

State whether each of the following statements is true (T) or false (F). 

a. The experimental results show imprinting behavior in the two bird species which is an example of a learned behavior. ___ 

b. Since one species could successfully find mates in spite of being reared by different species shows that courtship behavior is controlled only by genes and not affected by the environment. ___ 

c. Since both the species show a very small percent of mates of species that was their foster parents, shows that this behavior is genetically acquired. ___ 

d. The ability of the two species to consider the foster species as their own varied. This indicates that this behavior is genetically influenced. ___ 

e. The percent pairing success for blue-**** shows that foster parenting has no effect on the courtship behavior. ___ 

Diagrams A -D show the external or internal structures of leaves from different groups of plants.

Match these diagrams with the plants described by statements I – IV. 

I. The sexual reproductive structures are formed on an independent non-dominant plant body. 

II. Plants in this group have leaves with a haploid number of chromosomes. 

III. Plants in this group are seed-bearing and amongst the earliest evolved extant trees. 

IV. The mega gametophytes develop within enclosed ovules. 

a. I-B, II-A, III-D, IV-C 

b. I-B, II-D, III-C, IV-A 

c. I-C, II-A, III-B, IV-D 

d. I-D, II-B, III-A, IV-C

During blood circulation, the amount of blood reaching every organ will depend on several factors such as total weight of the organ, the type of metabolic function it performs etc. When body is at rest, the percentage of total blood flowing to different organs will vary. 

State whether each of the following statements is true (T) or false (F).

a. At rest, the blood supply to skin in cool weather will be greater than in hot weather. ________ 

b. Flow of blood (ml/min) per unit gram of tissue will be greater to kidneys than to the brain, at rest. ________ 

c. At rest, flow of blood (ml/min) to liver tissue will be much greater than heart. ________ 

d. When a person is at rest, a small percent (< 5%) blood will be found in bronchi. ___