Daily Science Final Test

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The correct answer is "ক্যারোলাস লিনিয়াস" (Carolus Linnaeus). Species Plantarum is a book written by Carolus Linnaeus, a Swedish botanist, in 1753. This book is considered one of the most important works in the field of botanical taxonomy as it introduced a standardized system for naming and classifying plants. Linnaeus' system of binomial nomenclature is still widely used in biology today.

Histology is the study of tissues. Tissues are groups of similar cells that work together to perform a specific function in the body. This field of study involves examining the structure, composition, and function of different types of tissues. It helps in understanding the organization and arrangement of cells in tissues and how they contribute to the overall functioning of organs and systems in the body.

The correct answer is "হিপোক্রেটিস" (Hippocrates). Hippocrates is considered the father of medicine and is known for his contributions to the field of healthcare. He is the founder of the Hippocratic School of Medicine and is credited with establishing medicine as a separate profession from other forms of healing. His teachings and theories laid the foundation for modern medicine and his ethical code, the Hippocratic Oath, is still followed by medical professionals today.

According to the rules of nomenclature, the fourth step in the classification hierarchy is the Order. This means that after the Phylum, Family, and Class, the next level of classification is the Order. Therefore, the correct answer is Order.

The correct answer is "বিটা সায়ানিন" which means "beta carotene" in English. Beta carotene is responsible for the purple color of the eggplant.

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The correct answer is "সাইটোকাইনেসিস" which means cytokinesis in English. Cytokinesis refers to the process of cell division, specifically the division of the cytoplasm to form two separate daughter cells. This process occurs after the nuclear division (mitosis or meiosis) and is essential for the growth and development of organisms. The other options mentioned (মেটাকাইনেসিস, ইন্টারকাইনেসিস, ক্যারিওকাইনেসিস) are not the correct terms for the division of the cytoplasm during cell division.

The process of protein synthesis from RNA is called translation.

During respiration, the Krebs cycle takes place in the mitochondria. The Krebs cycle is a series of chemical reactions that occur in the mitochondria of cells, and it is an essential part of cellular respiration. It is responsible for generating energy in the form of ATP, which is used by the cell for various metabolic processes. Therefore, the correct answer is "মাইটোকনড্রিয়ায়" (in the mitochondria).

The question asks which of the options is a DNA virus. The correct answer is "হেপাটাইটিস বি" (Hepatitis B), as it is caused by the hepatitis B virus (HBV), which is a DNA virus.

Rubeola is the correct answer because it is a viral infection caused by the measles virus. Rubeola is highly contagious and spreads through respiratory droplets. It is characterized by symptoms such as fever, cough, runny nose, and a rash. Rubella is caused by a different virus and is commonly known as German measles. Rabies is caused by a virus transmitted through animal bites, and Rhino refers to the rhinovirus which causes the common cold.

PCV stands for Pneumococcal Conjugate Vaccine, which is a vaccine used to protect against pneumococcal diseases, including pneumonia. Pneumonia is a common and potentially serious illness caused by the bacteria Streptococcus pneumoniae. The PCV vaccine helps to stimulate the body's immune response to fight against these bacteria and prevent pneumonia. Therefore, PCV is the correct answer for the question about the vaccine for pneumonia.

হিমোফাইলাস ইনফ্লুয়েঞ্জা বি একটি ব্যাকটেরিয়া জনিত রোগ নয়। সিফিলিস, প্লেগ এবং অ্যানথ্রাক্স সবগুলি ব্যাকটেরিয়া জনিত রোগ হলেও হিমোফাইলাস ইনফ্লুয়েঞ্জা বি একটি ভাইরাস জনিত রোগ।

রাফিনোজ একটি ডিসাকারাইড ক্যারবোহাইড্রেট যা পলিস্যাকারাইড নয়। এটি একটি ডিসাকারাইড কারণ এটি দুটি মণ্ডল গ্লুকোজ মধ্যে সংযুক্ত হয়ে থাকে, যা পলিস্যাকারাইডের বৈশিষ্ট্য নয়। আরও পলিস্যাকারাইড সমূহ যেমন গ্লাইকোজেন, সেলুলোজ এবং স্টার্চ পলিস্যাকারাইড হিসাবে পরিচিত।

The given options represent different types of sugars. Among them, fructose is the correct answer.

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The correct answer is "দ্রাঘিমাংশ ক্রিয়ায়" which means "in translational motion". This means that the change in acceleration does not occur in translational motion. The other options mentioned, such as "উচ্চতার ক্রিয়ায়" (in vertical motion), "পৃথিবীর ঘূর্ণন ক্রিয়ায়" (in rotational motion), and "অক্ষাংশ ক্রিয়ায়" (in angular motion) all involve some form of motion where a change in acceleration can occur.

When the lift is descending at a constant velocity, the person inside feels weightless. This is because the force of gravity acting on the person is balanced by the normal force exerted by the lift floor. As a result, the person perceives themselves to be weightless. Therefore, the statement "লিফট সমত্বরণে নিচে নামতে থাকলে আরোহীর ওজনের তারতম্য হয় না" (When the lift is descending at a constant velocity, the person inside does not feel any difference in weight) is correct.

When a pendulum is taken inside a rotating artificial satellite, it experiences a state of weightlessness. This is because the gravitational force acting on the pendulum is balanced by the centrifugal force due to the rotation of the satellite. As a result, the pendulum will swing freely without any external force affecting its motion. Therefore, the pendulum's oscillation period will remain unchanged, and it will swing indefinitely without any decrease or increase in its amplitude. Hence, the correct answer is "অপরিবর্তিত থাকবে" which means "It will remain unchanged".

The question asks which material has the highest durability. The correct answer is "হীরা" (diamond), as it is known to be the hardest material and has high resistance to damage or wear.

The given options are "ঘনত্ব" (density), "চাপ" (pressure), "পীড়ন" (force), and "পৃষ্ঠটান" (surface tension). All of these options except for "পৃষ্ঠটান" (surface tension) are scalar quantities. Scalar quantities have only magnitude and no direction. Surface tension, on the other hand, is a vector quantity as it has both magnitude and direction. Therefore, the correct answer is "পৃষ্ঠটান" (surface tension).

Maxwell was the scientist who first provided the theory of light, which included the concept of the speed of light. He formulated the famous set of equations known as Maxwell's equations, which unified the laws of electricity and magnetism and predicted the existence of electromagnetic waves, including light. Therefore, Maxwell was the first scientist to provide a comprehensive theory of light, including its speed.

The correct answer states that watching TV in a dark room is not recommended because it creates a complete internal reflection in the eyes. This means that the light from the TV screen reflects back into the eyes without any loss, causing strain and discomfort.

উত্তল লেন্স ব্যবহার করা হয় না গ্যালিলিওর দূরবীক্ষণ যন্ত্রে কারণ উত্তল লেন্স দূরবীক্ষণ যন্ত্রে ব্যবহৃত হয় না। উত্তল লেন্স মূলত মাথা বা উপরের অংশে থাকা বাস্তব বা মাথা বা উপরের অংশের ছবি কে বিস্তৃত করে দেয়। তাই এটি দূরবীক্ষণ যন্ত্রে ব্যবহৃত হয় না কারণ এর মাধ্যমে কোন বস্তুর ছবি ছোট করা যায় না।

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The correct answer is "সোডিয়াম" (Sodium). Sodium is one of the most important minerals for the human body. It plays a crucial role in maintaining fluid balance, regulating blood pressure, transmitting nerve impulses, and supporting muscle contractions. Sodium is also essential for the proper functioning of the kidneys and maintaining pH balance in the body. It is commonly found in table salt and various other foods.

The correct answer is "এডউইন হাবল". এডউইন হাবল মহাবিশ্বের সম্প্রসারণ সম্পর্কে প্রথম সঠিক ধারণা দিয়েছিলেন। তিনি মহাবিশ্বের প্রতিটি তারার দূরত্ব থেকে তার স্থানাংক বের করে এবং এটি তারাদের সম্প্রসারণের প্রমাণ হিসাবে ব্যবহার করেন। তার অনুসারে মহাবিশ্ব সম্প্রসারিত হচ্ছে।

প্রেসবায়োপিয়া হলে চোখের সমস্যা যা চোখের উপযোজন ক্ষমতা কমিয়ে দেয়। এটি হলে দূরের বস্তুগুলি স্পষ্টভাবে দেখা যায় না এবং সামগ্রিকভাবে চোখের ভালো দেখা কমে যায়। প্রেসবায়োপিয়ার কারণ হতে পারে চোখের লেন্সের কার্বনাইট এক্সকারশন বা চোখের সংক্রমণের সমস্যা।

Among the given options, the most harmful radiation for living organisms is ionizing radiation, which includes high-energy particles such as gamma rays and X-rays. These types of radiation have enough energy to remove tightly bound electrons from atoms, causing damage to DNA and other cellular structures. Therefore, the correct answer is "অতিবেগুনি রশ্মি" which translates to "ionizing radiation" in English.

The speed of sound is not affected by air pressure. Therefore, the answer "বায়ুর চাপ" (air pressure) does not have any influence on the speed of sound.

The correct answer is "সূর্য ও পৃথিবীর মধ্যে চাঁদ অবস্থান করে" which means "The moon is located between the sun and the earth." This answer states the correct position of the moon in relation to the sun and the earth during a solar eclipse. It is the moon that comes in between the sun and the earth, causing a solar eclipse.

The other options involve determining the presence or characteristics of sound waves. However, determining the depth of the sea does not involve the application of sound waves.

The given question describes a device that is created by joining two ends of two different metals and generates a temperature difference when an electric current flows through it. This device is called a thermocouple. A thermocouple is commonly used for temperature measurement and is based on the principle of the Seebeck effect, which states that a temperature difference between two junctions of dissimilar metals generates a voltage. Therefore, the correct answer is "থার্মোকাপল" (thermocouple).

When pressure increases, the volume of a substance decreases. This is known as Boyle's Law. Therefore, when pressure increases, the substance becomes more compact and its volume decreases.

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The correct answer is "সোডিয়াম, ক্রোমিয়াম, ম্যাঙ্গানিজ" which translates to "Sodium, Chromium, Manganese" in English. These elements (sodium, chromium, and manganese) are paramagnetic substances, meaning they are attracted to magnetic fields but do not retain their magnetism once the field is removed.

The given answer states that the lines create an open curved line. The other options mention that the lines are always generated from the North Pole to the South Pole, they apply lateral pressure on each other, and they never intersect. However, none of these options indicate that the lines create an open curved line. Therefore, the correct answer is that the lines create an open curved line.

This answer states that a step-up transformer converts high electrical current to low electrical current. However, the question asks for a characteristic that is NOT true for a step-down transformer. Therefore, this answer is incorrect.

When the cross-sectional area of a metallic substance decreases, its electrical resistance increases. This is because the electrons have less space to move through, leading to more collisions with atoms and thus increased resistance. Therefore, when the area increases, the electrical resistance decreases, allowing for easier flow of electric current.

The question asks for the first spacecraft sent to Jupiter. The correct answer is Galileo. Galileo was a NASA spacecraft that was launched in 1989 and reached Jupiter in 1995. It spent several years studying the planet and its moons before being intentionally crashed into Jupiter's atmosphere in 2003.

In a galvanic cell, the cathode is where reduction occurs, meaning it gains electrons and becomes negatively charged. Therefore, the statement "ক্যাথোড ঋণাত্মক চার্জযুক্ত হয়ে থাকে" (The cathode is negatively charged) is incorrect.

If four 100 watt bulbs are burned for 5 hours, the total energy consumed can be calculated by multiplying the power of each bulb by the number of hours they are burned. In this case, the total energy consumed is 100 watts * 4 bulbs * 5 hours = 2000 watt-hours or 2 units of electricity. Therefore, the correct answer is 2 units.

The journey of electronics began with the discovery of the vacuum tube. The vacuum tube was the first device that allowed the amplification and control of electrical signals. It played a crucial role in the development of early electronic devices such as radios and televisions. The discovery of the vacuum tube paved the way for further advancements in electronics, leading to the invention of transistors, integrated circuits, and computers. Therefore, the correct answer is "ভ্যাকিউম টিউব আবিষ্কারের মাধ্যমে" (through the discovery of the vacuum tube).

When the air pressure decreases, the column of the barometer rises. This is because the weight of the air above the column decreases, causing the column to rise in order to maintain equilibrium. Therefore, the statement that "বায়ুর চাপ কমলে ব্যারোমিটারের পারদ স্তম্ভের উচ্চতা বাড়ে" (when the air pressure decreases, the height of the barometer column increases) is correct.

ডায়োডকে সুইচ হিসেবে ব্যবহার করা হয় না। ডায়োড একটি অর্ধপরিবাহী উপাদান যা তড়িৎ প্রবাহ শুধুমাত্র একমুখী করে এবং প্রবাহ একদিকের মাত্র হতে দেয়। আরওয়াল, ডায়োডকে রেক্টিফায়ার হিসেবে ব্যবহার করা হয় যাতে এটি একমুখী প্রবাহ নির্মাণ করে এবং তড়িৎ সম্পূর্ণভাবে একমুখী হয়।

The correct answer is "গ্রুপ IV + গ্রুপ V". In the periodic table, elements in Group IV have four valence electrons, while elements in Group V have five valence electrons. When elements from these two groups combine, they can share or transfer electrons to achieve a stable octet configuration. This combination results in the formation of n-type semiconductors, which have an excess of electrons and can conduct electricity. Therefore, the combination of Group IV and Group V elements is used to create n-type semiconductors.

The question asks for the half-life of Uranium-238. The correct answer is "৪৫০ কোটি বছর" which means 450 billion years. This means that it takes 450 billion years for half of the Uranium-238 to decay into other elements.