The sun contains about 99.9 percent of the mass of the solar system.
Adaptation because organisms adapt to avoid extinction.
The substance that is coded for by a length of DNA is base. The correct option is A.
<h3>What is a base?</h3>
Nucleobases, also known as nitrogenous bases or simply bases, are nitrogen-containing biological compounds that form nucleosides, which are then components of nucleotides, all of which are the basic building blocks of nucleic acids.
The complete question is attached.
The substance that is coded for by a length of DNA is base.
Thus, the correct option is A.
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<h2>
Answer:</h2>
I believe the correct answer is FALSE.
<h2>
Explanation:</h2>
Innate immunity is a fast acting response to confront a pathogen but does not keep memory. It is initiated and carried out by cell and can be refered to as cellular immunity lasting for a short term.
<h2>Further Explanation:</h2><h3>Innate Immunity:</h3>
This is the first line of defence and involves only cells. It lasts for a short period usually around 12 hours. It includes physical barries. The cells involved are: epithelial cells, dendritic cells, plasma proteins and natural killer cells. All the cells involved are macrocytes. It functions to recognize and attack the pathogen before the second type of immunity called adaptive immunity sets in. It usually is also non specific and responds generally to any pathogen.
<h3>Adaptive Immunity:</h3>
It is a much more longer lasting type of immunities and has memory. It has a combination of cells and humoral components. It involves Naive B cells which are triggered to release antibodies known as Immunoglobulins depending on the cause of the trigger. Immunoglobulins include IgG, IgM, IgA, IgG and IgD and are usually Y-shaped. Additionally, it involves Naive T cells that are activated into Effector T-cells to assist in fighting the pathogen. This type of immunity is more focused and specific antibodies are released for specific infections/pathogens. It lasts up to 5 days or longer depending on the pathogen. It also takes time to mount up and produce a response.
Level: High School
Answer: They would be better able to survive in dry environment like deserts than animals with shorter loops.
Explanation:
The kidney is an organ found in animal that is used for the excretion of unwanted nitrogenous substances such as urea and other ammonium compounds from the blood. They also maintain the osmotic pressure of the blood by controlling the excretion of water and salts.
The urinary tubule is the functional unit of the kidney. This tubule is made up of:
--> Bowman's capsule
--> proximal convoluted tubule
--> loop of Henle
--> distal convoluted tubule and
--> collecting ducts.
The ability of the kidney to form a urine that is more concentrated than plasma is essential for survival of mammals that live on land including humans. When there is short supply of water, desert environment, the kidney forms a concentrated urine by continuing to excrete solutes while increasing water reabsorption and decreasing the volume of urine formed. The requirements for excreting a concentrated urine depends on the anatomical arrangement of the loop of Henle. A LONGER loop of Henle provides more osmotic gradient necessary for water reabsorption to occur than a shorter one there by limiting the need for water intake.
