Answer:
Each time a cell prepares to divide into 2 new cells, it must make a new copy of the DNA in its chromosomes. This process is not perfect, and errors can occur that may affect genes within the DNA. Cancers can be caused by DNA mutations (changes) that turn on oncogenes or turn off tumor suppressor genes.
Explanation:
Answer:
He should look out for tiny leaf-like structures which mosses possess but algae does not .
Explanation:
In general, moss looks fibrous, feathered or latticed when viewed up close. Carpets of moss are springy to the touch. When germinating, moss puts up thin stems sometimes with leaves on top and reproductive spores. Algae have no threadlike structures or leaves. Instead, algae spread as a clump of living cells. Because algae usually grow in wet environments, they look like a slimy, wet mass, often green in color. Both moss and algae may appear green or brown depending on species and the dryness of the conditions.
Answer:
C. Organs are composed of tissues , which are composed of cells .
