The sequence of amino acid in polypeptide is dictated by the codons in the messenger RNA molecules from which polypeptide was translated. The sequence of codons in the mRNA was in turn dictated by the sequence of codons in the DNA from which the mRNA was transcribed. The amino acids are linked covalently by peptide bonds.
Answer: Option D) there are no holes for blood to enter or leave the system
The human cardiovascular system is considered closed because there are no holes for blood to enter or leave the system
Explanation:
The closed circulatory system are made up of blood vessels called arteries from the heart that branch into small units called capillaries but eventually join up with other blood vessels called veins that are connected to the heart. So, blood is always confined to circulate within the blood vessels and the heart as there are no holes for blood to enter or leave the system
Thus, the human cardiovascular system is considered closed
The greenhouse effect is necessary to explain
why weather occurs. The climate of the Earth is greatly affected by two
opposing processes: the greenhouse effect and atmospheric convection. The
greenhouse effect is acting to warm the lower atmosphere and cool the
upper atmosphere while the atmospheric convention (composed of thermals,
clouds, precipitation) is cooling the lower atmosphere and warms the upper
atmosphere). <span>The greenhouse effect warms the Earth’s surface, but very few people are
aware that weather processes greatly limit that warming.<span> In the absence of greenhouse effect, the Earth will
be left without weather.</span></span>
Answer:
in phagocytosis, the cell membrane surrounds the particle and engulfs it. ( credit: Mariana Ruiz Villareal) Phagocytosis (the condition of “cell eating”) is the process by which large particles, such as cells or relatively large particles, are taken in by a cell.
Explanation:
The answer is A because if it is 4th power