<span>They cause chemical weathering, releasing small quantities of organic acids which can dissolve limestone. This is sometimes referred to as biological weathering.</span>
<h2>Answer:</h2><h2 /><h2>DNA molecules are a precursor to self-replicating RNA molecules, which are used to build proteins. Early RNA molecules were able to self-replicate, which helps to explain why all organisms share the same genetic code.</h2>
The secret weapon of any insect that walks on water is in its body hair. Water striders and fishing spiders both have legs and bodies that are covered in a thick layer of tiny hairs. These hairs trap air in between them, repelling water and helping them keep the bugs afloat. If the insect were to get wet through, it wouldn’t be able to walk on the surface of the water anymore.
Answer:
C. 0.7
Explanation:
according to Hardy-Weinberg principle
sum of the frequencies for all the alleles at the locus must be 1, so p + q = 1.
+ = 1
q = 1 − p
q = 1 − (0.3)
q = 0.7
