Answer:
Gymnosperms and lower vascular plants have sieve cells as their sieve elements, while sieve tubes are characteristic of flowering plants angiosperms. In gymnosperms, typical companion cells are lacking in the phloem. In gymnosperms, generally the xylem contains only tracheids. Vessels are absent.
Explanation:
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A true fruit is a ripened ovary that usually starts ripening when it is
fertilized. And vegetable is any vegetative part of the plant which is
edible and contains stored food probably in the form of starch.
These
definitions are not exact as there are a lot of fruits which are fruits
but do not strictly follow the given definition. See Syconus, Composite
fruits, Sorosis.etc
Classification is based on several different
criteria, for example the mode of reproduction, arrangement and design
of flowering parts and flowers and also on the basis of habitat and
habit.
Answer:
D
Explanation:
Diffusion and osmosis are both passive forms of transport because there is no energy need to transport something such as water from an area of high pressure, to an area of low pressure.
It is a system of chronological dating that relates geological strata to time.
Answer:
1) Liquid hydrogen has the lowest density of any liquid.
2) Hydrogen is the chemical element with the symbol H.
3) Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass.
4) Atomic mass: 1.00784 u
5) Atomic number: 1
