Most Angiosperms Have Alternate Phyllotaxy

question 31

Multiple Choice

Most angiosperms have alternate phyllotaxy. What allows each leaf to get the maximum exposure to light and reduces shading of lower leaves?

• A)a leaf area index above 8
• B)self pruning
• C)one leaf only per node
• D)leaf emergence at an angle of 137.5° from the site of previous leaves
• E)A and D

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Definitions:

Heterozygotes

Individuals having two different alleles of a particular gene, resulting in a mixture of genetic traits.

Null Hypothesis

A default hypothesis that there is no significant difference or effect, used as a starting point for statistical significance testing.

Allele Frequencies

The proportion of different genetic variants of a gene in a population, denoting the genetic diversity at that specific locus.

Mutation-Selection Balance

An evolutionary principle describing the equilibrium achieved when the rate of new mutations equals the rate of removal of disadvantageous alleles by natural selection.