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19 votes

Is it scientifically sound to pool repeated measurements?

If you use the configuration on the left, your variance across tubes reflects variance between individuals. If you use the configuration on the right, your variance across tubes reflects primarily ...
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18 votes
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This looks like it was somebody’s home - but who?

That looks similar to the dried fruit of Echinocystis lobata (wild cucumber), which grows throughout New York. The fruit is about the right size (~3 cm) and shape, whereas the best alternative I can ...
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7 votes
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Coniferous tree with alternating bunches of short needles (Toronto area)

Short Answer Larix laricina, commonly called Tamarack or American Larch is a deciduous conifer with short-needle-like leaves arranged in bunched fascicles in a alternating (sometimes whorled) ...
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3 votes
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Shape of the first leaves of a plant

They are referred to as cotyledons (seed-leaves). Apples as specified in the question are dicotyledons, they have two seed-leaves. Some other plants are monocotyledonous, i.e. just have a single seed ...
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2 votes

Tree identification in the Caribbean

The photos of this tree indicate that it is a horseradish-tree (Moringa oleifera). See https://rngr.net/publications/common-trees-of-puerto-rico-and-the-virgin-islands as well as google searches of ...
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1 vote
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Is it scientifically sound to pool repeated measurements?

Your intuition is largely correct here. Bryan Krause's comments focus on where your answer is wrong. Some of his statements are true, others are speculative. His answer, combined with your intuition, ...
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1 vote

Why do fruits have to ripen?

Some of the main reasons for delayed fruit ripening are to protect immature seeds, to save energy, and incompatibility between fruit and flower morphologies. Fruits that are sweet have generally ...
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