B: nucleus, mitochondria, cell membrane
c and d both have chloroplasts which are unique to plant cells
a is wrong because only plant cells have cell walls
The Cambrian Period marks an important point in the history of life on Earth; it is the time when most of the major groups of animals first appear in the fossil record. This event is sometimes called the "Cambrian Explosion," because of the relatively short time over which this diversity of forms appears
The two authors who were known for their critical writing about the excesses and problems resulting from industrialization were Wingspanens and Mark Twain. Charles Wingspanens is better known by the name Charles Dickens. The correct answer is C.
The signs and symptoms of a cluster headache include severe<span> right-sided headache with a runny nose, droopy eyelids, and tearing of the eye on the right side.
</span>The injectable form of sumatriptan<span> (</span>Imitrex<span>), which is commonly used to treat a migraine, is also an effective treatment for acute cluster headache</span>
Answer:B. Their DNA molecules have different numbers of strands.
Explanation:that is chromosome that make them to differ in diploid numbers thus differ generally and appear differently