Answer:
Dip-slip faults are inclined fractures where the blocks have mostly shifted vertically. If the rock mass above an inclined fault moves down, the fault is termed normal, whereas if the rock above the fault moves up, the fault is termed reverse. A thrust fault is a reverse fault with a dip of 45 degrees or less.
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Answer:
D. large-sized fishes
Explanation:
The energy flow in the trophic level from highest to lower level is as follows:
Large-Sized Fishes => Fishes and Crabs (Larvae) => Zooplankton => Diatoms/Algae.
The concentration of toxics or chemical substance increases from lower level (primary producers) to highest level, so the organism at apex contain highest concentration of chemical fertilizer.
In this example, large-sized fishes have highest concentration of chemical fertilizer.
Hence, the correct answer is D. large-sized fishes.
They posses buttress root so as to prevent the tree from falling
Answer:
Let "L" be the dominant allele for little finger shape and "l" be the recessive allele for the same.
It is given that a person is homozygous dominant for blood group B and little finger shape. Hence, the genotype would be 
<em>LL</em>
The other person is heterozygous for blood group A and homozygous recessive for little finger shape. Hence, the genotype would be 
The type of gametes formed by the first parent would be 
<em> </em>only.
The type of gametes formed by second parent would be 
and <em>il.</em>
The cross is shown in the attached figure.
According to the cross, we get two phenotype:
- offspring with blood group AB and dominant little finger shape, and
- offspring with blood group group B and dominant little finger shape.
- They are present in 4 : 4 = 1 : 1
According to the cross, we get two genotype:
- They are also present in 4 : 4 = 1 : 1.
Answer: B) the presence of inherited antigens on the surfaces of erythrocytes.
Explanation:
A blood group is a classification of the blood according to the characteristics present on the surface of the red blood cells called erythrocytes. The two most important classifications for describing blood groups in humans are antigens (the AB0 system) and the Rh factor.
The AB0 system was discovered in 1901, and was the first known blood grouping system; its name comes from the <u>three types of groups that are identified: antigen A, antigen B, and 0 (zero) without antigens.</u>
<u>Each individual has a different set of erythrocyte antigens</u>, and because of their number -there are currently 32 known antigenic systems, plus some differentiated antigens that have not yet been attributed to any specific system- it is difficult to find two individuals with the same antigenic composition. Different antigenic systems are characterized by inducing antibody formation at different intensities; therefore some are more common and others are more rare. <u>So, the antigenic systems considered most important are the AB0 system and the RH system</u>.
Characteristics of the AB0 system are:
- People with type A blood: their red blood cells express type A antigens on their surface and develop antibodies to the B antigens in the plasma.
- People with type B blood: their red blood cells express type B antigens on their surface and develop antibodies to the B antigens in the plasma.
- Persons with type 0 blood: they have no such antigens (A or B) on the surface of their red blood cells, but develop antibodies to both types.
- Persons with type AB blood: having both antigens on the surface of their red blood cells, they do not make any antibodies to the A or B antigen.
The Rh system is the second blood group system in human blood transfusion with 50 antigens currently. In 1940, another group of antigens was discovered and they were called Rhesus factors (Rh factors). People with rhesus factors in their blood are classified as "Rh positive", while those without the factors are classified as "Rh negative". It is common for D-negative individuals to have no anti-D IgG (immunoglobulin-G) or IgM antibodies, since anti-D antibodies are not normally produced by sensitization to environmental substances. Rh-negative people form antibodies to the Rh factor, if they are exposed to Rh-positive blood.
