A. Heart B. Brain C. Lungs D. Kidneys The heart is the first organ to form during development of the body. When an embryo is made up of only a very few cells, each cell can get the nutrients it needs directly from its surroundings.
A. 02 B. 03 C. 04 D. 05 In humans, other mammals, and birds, the heart is divided into four chambers: upper left and right atria and lower left and right ventricles. Commonly the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart.
A. Study of speech sounds B. Study of language and rules C. Study of insects D. Study of meaning and syntax
A. 107 B. 209 C. 304 D. 416
A. Snow B. Lightning C. Hailstorms D. Thunders
A. Hailstorms B. Thunders C. Rain D. Lightning
A. shorter B. shortest C. longer D. longest Very High Frequency (VHF) have shorter wavelengths? Very high frequency is the ITU designation for the range of radio frequency electromagnetic waves from 30 to 300 megahertz, with corresponding wavelengths of ten to one meters.
A. Transmitter B. Transmission channel C. Receiver D. Hardware
A. Spring B. Summer C. Winter D. Autumn In the northern hemisphere, the vernal equinox (March) conventionally marks the beginning of spring in most cultures and is considered the start of the New Year in the Assyrian calendar, Hindu, and the Persian or Iranian calendars, while the autumnal equinox (September) marks the beginning of autumn.
A. Michael Faraday B. Oliver Evans C. Thomas Edison D. Horace Day