Answer:
D. They release waste into the bloodstream.
Explanation:
Kidneys are the primary organs of the excretory system. Their primary function is to remove the metabolic waste from the blood and release it out of the body in the form of urine. The nitrogenous waste, drugs, uric acid, and other metabolic waste products are removed from blood in kidneys.
Hence, kidneys do not release the waste into the bloodstream, rather release them out of the body and filter the blood.
Answer:
Abrasion
Explanation:
Because, "Abrasion is the grinding away of rock by friction or impact."
Answer:
In the transcription of DNA to mRNA, for the DNA sequence 3'-AGGTCTCAC-5' corresponds to an mRNA sequence 5'-UCCAGAAGUG-3'.
Explanation:
Transcription is the process by which a strand of mRNA, needed to direct protein synthesis in the cytoplasm, is synthesized from a strand of DNA.
The sequence of nucleotides in the RNA chain depends on the sequence of bases in the DNA strand, being placed according to the complementarity of nitrogenous bases, where a purine is complemented with a pyrimidine.
In RNA, the thymine base is replaced by Uracil, the complementary base to adenine of DNA.
<u>ADN mRNA</u>
A U
T A
C G
G C
For this reason:
<em>DNA:</em><em> 3’ A G G T C T T C A C 5’</em>
<em>mRNA:</em><em> 5'-U C C A G A A G U G-3'</em>
A pair of centrioles make up one centrosome, which a centrosome is considered an organelle. Depending on your course definition of sub-organelle, centrioles may be considered so, however, centrioles are generally regarded as individual organelles.
