The following figure is a model of seedling establishment as a function of distance from a parent tree. Initial seed density measures the number of seeds falling to the ground. Seed survivorship measures the proportion of seeds that survive to the adult stage at each distance

Which of the following factors is most likely to generate the seed survivorship curve shown? 

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#Question id: 13150

#Unit 8. Inheritance Biology

A fruit fly Drosophila melanogaster showing  three point test cross  st+-e+-ss+  was crossed with triplet recessive mutant st-e-ss. The F1 hybrid  was the backcross with the recessive mutant and the phenotype recorded as follows;

The distance in map unit (mu) between  st+  to  e+ and e+ to ss+ is

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#Question id: 4656

#Unit 11. Evolution and Behavior

Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?

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#Question id: 5277

#Unit 8. Inheritance Biology

Deduce the genotype of bacteria strain was shown either growth presents or not in different media?

Media supplement
	Minimal	Minimal + Arginine	Minimal + Methionine	Minimal + Arginine+ Methionine
Growth	No	Yes	No	Yes

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#Question id: 16094

#Unit 7. System Physiology – Animal

When measured orally the average normal temperature is considered to be:

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#Question id: 13171

#Unit 10. Ecological Principles

Imagine some cosmic catastrophe jolts Earth so that its axis is perpendicular to the orbital plane between Earth and the sun. The most obvious effect of this change would be