If a gamete produced following non disjunction of a chromosome at second meiotic division was fertilized by a normal gamete, what is the expected frequency of trisomic progeny?
Anonymous Poll
25%
1. 1/4
45%
2. 2/4
26%
3. 3/4
5%
4. 1
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The black buck (Antilope cervicapra) has been traditionally protected by which one of the following communities?
Anonymous Poll
15%
1. Bhils
14%
2. Jats
67%
3. Bishnois
4%
4. Ahirs
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Savannas are biomes where tree and grass vegetation coexist over large areas. Which one of the following statements does NOT explain the occurrence of savannas in the India subcontinent?
Anonymous Poll
23%
1. Selective logging of forests opens up the canopy and grasses take over
39%
2. Low rainfall maintains low tree cover that helps grasses establish
22%
3. Fires do not allow trees to establish closed canopies
16%
4. Browsing by herbivores limits tree establishment
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An ecologist studying molluscs concluded that there is a correlation between the thickness of the shell and weight of the mollusc. Based on this information, one can conclude that
Anonymous Poll
27%
heavier molluscs are better defended from attacks by predators.,
27%
heavier molluscs are poorly defended from attacks by predators.,
25%
most likely there's cause-effect relationship between the 2 trait
21%
weight and thickness are variable traits in mollusc population,
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Which of the following life history traits is most likely in a rodent species when snakes prefer to prey upon large, older individuals of the rodent species that grow continuously over their lifespan?
Anonymous Poll
21%
1. Early reproduction and slow growth rate
26%
2. Delayed reproduction and fast growth rate,
30%
3. Delayed reproduction and slow growth rate,
24%
4. Early reproduction and fast growth rate,
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Pick the statement that includes both a proximate and an ultimate explanation for the evolution of a given behaviour.
Anonymous Poll
12%
1.Elevated heart beat and higher levels of stress hormone
27%
2.Scent marking along boundaries of territories & high aggression
34%
3.Social communication through odours & increased group survival
27%
4.Higher maternal fitness and increased offspring survival,
The distribution of heights of college students aged between 18 to 20 was found approximately normally distributed with an average (mean) of 54 inches and a standard deviation of 2.5 inches. What will be the z-score for a student who is five feet tall?
Anonymous Poll
13%
1. 2.4
56%
2. 3.1
25%
3. 1.5
6%
4. 2.9
In a type I hypersensitivity- mediated asthmatic response, which one of the following is thought to contribute significantly to the prolonged bronchospasm and build-up of mucous seen in asthmatics?
Anonymous Poll
20%
(1) Thromboxane
45%
(2) Leukotriene
27%
(3) TGFฮฒ
7%
(4) Chondroitin
In certain plants, the mechanism where timing of anther dehiscence and stigma receptivity do not coincide to avoid self-pollination is called
Anonymous Poll
30%
(1) dichogamy
49%
(2) herkogamy
14%
(3) monoecy
7%
(4) Dioecy
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