They had to adapt to the heat and to learn to survive long periods without water
With fossils, scientists can use carbon dating to determine the approximate age of whatever fossil they have.
Answer:
An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body.
Explanation:
Some examples of organelles are endoplasmic reticula, Golgi apparatus, lysosomes, vacuoles, mitochondria, plastids, and nucleus.

No, the arrangement of vascular bundles in the stem same for all plant species.
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☆ <u>In</u><u> </u><u> Monocot </u><u> </u><u>Stems</u></h2>
In monocots, xylem and phloem are organized in vascular bundles scattered throughout the stem. As the plant grows, monocot stems generate new vascular bundles for the new tissue. Monocot stems in general possess a simpler arrangement than that found in dicots.
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☆ <u>
In Dicots</u>
<u> </u><u>Stems</u></h2>
Within the class of plants known as dicots, herbaceous dicots and woody dicots have different arrangements of vascular tissues. In herbaceous dicots (plants, mostly annuals, with soft, non-woody stems), vascular tissue remains in discrete bundles even at maturity. In contrast, when mature woody dicots (plants, mostly perennials, with woody stems) reach maturity, the vascular bundles join together to form continuous rings around the interior of the stem.
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<em><u>ThankYou</u></em><em><u> </u></em>✔✔</h2>
Answer:
Like DNA, RNA polymers are make up of chains of nucleotides *. These nucleotides have three parts: 1) a five carbon ribose sugar, 2) a phosphate molecule and 3) one of four nitrogenous bases: adenine, guanine, cytosine or uracil.
Explanation:
ribose + phosphate group + uracil