Biology

General

Easy

Question

# A definition of the term "Species" based on reproduction has distinct limitations, which include its

- Of little use when defining fossil species
- Inapplicable to species that do only asexual reproduction
- Of little use when organisms produce hybrids
- All of the above

## The correct answer is: All of the above

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### The length of the chord joining the points $\left(4\mathrm{cos}\theta ,4\mathrm{sin}\theta \right)$ and $(4\mathrm{cos}\left(\theta +60\xb0\right),4\mathrm{sin}(\theta +60\xb0)$of the circle ${x}^{2}+{y}^{2}=16$ is

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In an orbital motion, the angular momentum vector is

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