A. Nitrogen
B. Oxygen
C. Chloride
D. Fluorine
Correct Answer: D. Fluorine
Electronegativity increases from bottom to top in groups, and increases from left to right across periods. Thus, fluorine is the most electronegative element, while francium is one of the least electronegative.
A. 100 grams
B. 200 grams
C. 300 grams
D. 400 grams
Correct Answer: C. 300 grams
A. Ixora
B. Ixchiq
C. ChikuGuard
D. ChiVac
Correct Answer: B. Ixchiq
The U.S. Food and Drug Administration approved Ixchiq, the first chikungunya vaccine. Ixchiq is approved for individuals 18 years of age and older who are at increased risk of exposure to chikungunya virus. The chikungunya virus is primarily transmitted to people through the bite of an infected mosquito. Chikungunya is an emerging global health threat with at least 5 million cases of chikungunya virus infection reported during the past 15 years.
A. Pons
B. Cerebellum
C. Hippocampus
D. None of these
Correct Answer: D. None of these
The activities like sleeping, walking, and dreaming are controlled by different parts of the brain. Specifically:
• Sleeping is regulated by various areas of the brain, including the hypothalamus and brainstem.
• Walking and coordination are primarily controlled by the cerebellum.
• Dreaming involves complex neural activity that is not localized to a single brain region but involves various areas of the brain, including the cerebral cortex.So, the correct answer is D. None of these, as no single part of the brain exclusively controls all of these activities. They are the result of coordinated activity across multiple brain regions.
A. 0.2 nm
B. 2nm
C. 20nm
D. 200nm
Correct Answer: B. 2nm
Electrical synapses are gap junctions. When present between neurons, they are very different from chemical synapses where the separateness of the cells is not in question. They allow the direct spread of current from one cell to another, without delay or need for receptor and decoding systems. But the individuality of the coupled cells is partly lost, and hence their utility is diminished for large nervous systems with labeled lines like those of mammals. Electrical synapses are common in invertebrate and nonmammalian nervous systems but infrequent in mammals except between neuroglial cells, where they offer the chief mode of communication.
A. Sea Horse
B. Starfish
C. Octopus
D. Jellyfish
Correct Answer: B. Starfish
When looking at a sea star–or starfish–it’s not really clear which part of its identical five pointed body is considered its head. This question has puzzled biologists for decades, but some new research says that a starfish’s whole body could function like a head. The findings are described in a study published November 1 in the journal Nature and might have solved the mystery of how sea stars and other echinoderms evolved their distinctively shaped bodies.
A. United States
B. United Arab Emirates
C. China
D. United Kingdom
Correct Answer: D. United Kingdom
A new Covid-19 variant called Eris or EG.5.1 is rapidly spreading across the United Kingdom. he new Covid-19 variant Eris was first reported in July, and by the 31st of the same month, it was increasingly recognised as one of the prominent strains in the UK. Eris is also being detected in other countries, including the United States, Canada, Japan, and Australia.
A. H2O
B. NaCl
C. CO2
D. Mg
Correct Answer: D. Mg
Among the options given, Mg (magnesium) is not a compound. It is an element, represented by its chemical symbol on the periodic table. H2O (water), NaCl (sodium chloride), and CO2 (carbon dioxide) are all compounds made up of multiple elements chemically bonded together.
A. 1 F – 48 F
B. 8 F – 68 F
C. 54 F – 98 F
D. 94 F – 108 F
Correct Answer: C. 54 F – 98 F
C (54 F – 98 F) is the right option for a mercury thermometer with a linear scale. The expansion of mercury in the bulb will cause it to rise in the tube, and the linear scale on the tube will indicate the corresponding temperature readings.
A. Yellow
B. Blue
C. Red
D. Green
Correct Answer: C. Red
The coolest stars are generally associated with the color red. Option C, “Red,” is the correct answer. Red stars typically have lower surface temperatures compared to other stars, such as blue or yellow stars. Cooler stars emit more red light, while hotter stars emit more blue light. The color of a star is an indication of its surface temperature, with red stars being cooler than blue stars.