Two varieties of maize averaging 25 and 125 inches in height, respectively, are crossed. The F1 progeny is quite uniform averaging 75 inches in height. Plant height is control by 3 QTL, what is the probability of plant with 25 inch height in F2 generation?

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#Question id: 5028

#SCPH28 | Zoology

What is the probable sequence in which the following clades of animals originated, from earliest to most recent?

1. tetrapods

2. vertebrates

3. deuterostomes

4. amniotes

5. bilaterians

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#Question id: 5029

#SCPH06 I Botany

Which of the following was the least likely factor causing the Cambrian explosion?

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#Question id: 5029

#SCPH28 | Zoology

Which of the following was the least likely factor causing the Cambrian explosion?

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#Question id: 5030

#SCPH06 I Botany

There is evidence that ray-finned fishes originally evolved

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#Question id: 5030

#SCPH28 | Zoology

There is evidence that ray-finned fishes originally evolved

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#Question id: 5031

#SCPH06 I Botany

Which era is known as the ʺage of reptilesʺ?