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Question - 1 : দক্ষিণ আফ্রিকা কত বছর শ্বেতাঙ্গ শাসনে ছিল ?

a) ৩০০বছর

b) ৩৩৫বছর

c) ৩৪২ বছর

d) ৫০০বছর

Discus in Board
Question - 2 : যদি (x-y)2 =14 এবং xy=2 হয় তবে x2+y2= কত?

a) 12

b) 14

c) 18

d) 16

Discus in Board
Question - 3 : কোন দেশটি ল্যাটিন আমেরিকার অন্তর্ভুক্ত নয়?

a) ব্রাজিল

b) আর্জেন্টিনা

c) পেরু

d) কোনটাই না

Discus in Board
Question - 4 : NIPORT কি?

a) বন্দর বিষয়ক গবেষনা প্রতিষ্ঠান

b) নদী বন্দর বিষয়ক গবেষনা প্রতিষ্ঠান

c) জনসংখ্যা বিষয়ক গবেষনা প্রতিষ্ঠান

d) পোলট্রীফার্ম বিষয়ক গবেষনা প্রতিষ্ঠান

Discus in Board
Question - 5 : এবং তোমার কি অবস্থা?

a) How about you and?

b) And how about you?

c) And how about you are?

d) And how are about you?

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Question - 6 : তুমি মনে হয় আমার সাথে মজা করছো !

a) You’ve got to be kid me!

b) You’ve got to be kids me!

c) You’ve got to be kidding me!

d) You’ve got to be kidding to me!

Discus in Board
Question - 7 : He has been ill - Friday last.

a) in

b) since

c) on

d) from

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Question - 8 : সে কঠোর পরিশ্রম করে যাতে সে দ্রুত উন্নতি করতে পারে |

a) He works hard so that he can prosper soon.

b) He is working hard so that he can prosper soon.

c) He works hard that he can prosper soon.

d) He works hard so that he can prosper so soon.

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Question - 9 : সে সমুদ্রে ছিলো ১৫ মাসের জন্য |

a) He was at sea for fifteen month.

b) He was in sea for fifteen months.

c) He was to sea for fifteen months.

d) He was at sea for fifteen months.

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Question - 10 : পারমাণবিক চুল্লিতে তাপ পরিবাহক হিসেবে কোন ধাতু ব্যবহৃত হয় ?

a) ক্যালসিয়াম

b) সোডিয়াম

c) পটাসিয়াম

d) ম্যাগনেসিয়াম

Discus in Board

Red Blood Cells (likewise called erythrocytes or RBCs)

Known for their brilliant red shading, red cells are the most bounteous cell in the blood, representing around 40 to 45 percent of its volume. The state of a red platelet is a biconcave circle with a straightened focus - as it were, the two essences of the circle have shallow bowl-like spaces (a red platelet resembles a doughnut).

Generation of red platelets is constrained by erythropoietin, a hormone created fundamentally by the kidneys. Red platelets start as juvenile cells in the bone marrow and after around seven days of development are discharged into the circulation system. In contrast to numerous different cells, red platelets have no core and can without much of a stretch change shape, helping them fit through the different veins in your body. Notwithstanding, while the absence of a core makes a red platelet progressively adaptable, it additionally restricts the life of the cell as it goes through the littlest veins, harming the cell's films and draining its vitality supplies. The red platelet makes due all things considered just 120 days.

Red cells contain a unique protein called hemoglobin, which helps convey oxygen from the lungs to the remainder of the body and afterward returns carbon dioxide from the body to the lungs so it tends to be breathed out. Blood seems red as a result of the huge number of red platelets, which get their shading from the hemoglobin. The level of entire blood volume that is comprised of red platelets is known as the hematocrit and is a typical proportion of red platelet levels.