Answer: D
Explanation: when gasoline is burned by the car, it releases gas which pollutes the air.
1 ) A
2 ) C
3 ) C
4 ) C
5 ) B
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.
Answer:
1. metaphase I
2. telophase II
3. anaphase I
4.prophase II
5. prophase I
6. anaphase II
7. telophase I
8. metaphase II
Explanation:
1. During _metaphase I________, pairs of homologous chromosomes align in the center of the cell.2. During _telophase II___, the separated chromatids elongate and (usually) cytokinesis occurs, formingfour genetically distinct haploid daughter cells.3. During _anaphase I_______, homologous chromosomes separate by moving with the spindle microtubulestoward the poles.4. During __prophase II______, a spindle apparatus forms and individual chromosomes (each composed ofsister chromatids) begin to move toward the center of the cell.5. During _prophase I_______, chiasmata form and crossing-over occurs.6. During _anaphase II_______, sister chromatids separate and move toward the poles.7. During __telophase I______, the separated chromosomes cluster at the poles of the spindle and cytokinesis occurs, forming two daughter cells, each with a haploid set of replicated chromosomes.8. During ___metaphase II_____, individual chromosomes (each composed of sister chromatids) align in the center of the cell.
The closing of a plants stomata will prevent plants from taking in (Carbon dioxide) or co2; Without co2, plants cannot make carbohydrates, and plants can only obtain this critical molecule (carbohydrates) when stomata are open. Hope this helps ya out :)
