Social Sciences

Some disadvantages of using animals in medical tests are the animals are held captive or killed, it is costly, the substances tested may never be used and the differences between animals and humans. A few advantages are researchers are able to find drugs and drugs are ensured to be safe.

Yes, photosystems are clusters of chlorophyll and other pigments, as well as proteins, that are essential components of the light-dependent reactions in photosynthesis. They work together to absorb light energy and initiate the electron transport chain that drives the production of ATP and NADPH.

Movement of particles

The temperature of a star can be determined most directly from its color. Hotter stars appear blue or white, while cooler stars appear red. This relationship is known as Wien's law.

The government should ban plastic bags because it is harmful for the environment. Eg. Because plastic bags are sometimes left on the ground they can get caught up in the ocean and kill fish and other...

Not all of the energy in a gallon of gasoline can be used because a significant portion is lost as waste heat during combustion in an engine. Only about 20-30% of the energy from gasoline is actually converted into useful mechanical work to power a vehicle, with the rest being dissipated as heat.

Old ham in the refrigerator undergoes chemical changes due to the breakdown of proteins and fats by bacteria and enzymes. The formation of new compounds during this process is characteristic of a chemical change.

In the early morning, shadows tend to be long and stretched out due to the angle of the sun being lower in the sky. The shape of the shadow will depend on the object's height and the direction of the sunlight. The shadows will appear softer and lighter compared to when the sun is directly overhead.

where will i get this stupid answer? really you guys useless idiots

black tailed Praire Dogs, coyotes, wolves, Northern short-tailed shrew, grey fox, American mink, hen harrier, gyrfalcon, raven, house mouse, muskrat, Brown rat, black rat, grey squirrel, wild turkey, Grizzly bear, mule deer, white tailed deer, red deer, moose, bighorn sheep, American bison, pronghorn, American badger, spotted skunk, weasel, stoat, striped skunk, fisher, north American otter, wolverine, ptarmigan,

On one side it's called the "Eastern Hemisphere", while on the other side

it's called the "Western Hemisphere".

Uplifting, through geological processes like tectonic uplift or volcanic activity, can change landforms by raising the Earth's crust. This can lead to the formation of mountains, plateaus, and hills. Over time, uplifting can also impact erosion patterns and create new hydrological systems.

Laredo, Texas is located at approximately 27.5306° N latitude and 99.4803° W longitude.

The goal of Project Mercury was to put a human in orbit around the Earth and safely return them. It aimed to develop and test technologies necessary for human spaceflight, such as spacecraft design, life support systems, and astronaut training.

the oldest man who went

to space was 77years old

Warm fronts typically bring gradual changes in weather and are often associated with lower pressure. Cold fronts, on the other hand, bring more abrupt weather changes and are associated with higher pressure.

Old answer: Every day. New one : I think every year.

It is a considerable fact that Sun is the centre of our life rather it may be said that sun is the basic source of our life. Living inside the solar system we can not see anything beyond 150 million kilometer in the darken part of earth, but for other reasons we have been watching hundred of light years away various space objects and mysteries i.e. asteroids, milky ways, galaxies, supernovas, white dwarfs, nebulas, black holes, extra solar systems etc. that is other wise called at "mysteries of space mirror" and it can prove that sun is the only luminous body and only star in the total universe. Visit: - www.spacemirrormystery.com for details.

Worms are classified under helminthes. They can be further sub classified into flat worms or Platyhelminthes, Round worms or Aschelminthes, Tape worms or Cestodans. Worms are also classified based on the life style, shape etc. into hook worm, pin worm etc.

Coz sky is black.

If moon appear in day when sun is shines then moon will be not bright simple.

EDITED : ... What grade are you in? That a horrible explanation.

The moon is so bright at night because at night The Sun and The moon is Aligned so that the Sun's light would hit the moon and which bounce off the moon through the earth. Thus, The moon is bright at night.

Hawaii includes the coordinates of 20 degrees north latitude and 158 degrees west longitude.

The Earth completes an orbit around the Sun once every 365.25 days, which we refer to as one year. This is what gives us our calendar year.

Prior to 1989, trichlorofluoromethane (CFC-11) and dichlorodifluoromethane (CFC-12) were the most used chemical compounds in aerosol-spray propellants. Their use was discontinued under the Montreal Protocol.

The compass was invented during the Han Dynasty in ancient China. While there were multiple inventors involved in its creation, the Chinese explorer and inventor, Shen Kuo, made significant improvements to the design of the compass.

A volcano can negatively affect the Earth's surface by causing widespread destruction through lava flows, ash fall, and pyroclastic flows. This can lead to the loss of life, destruction of habitats, and disruption to ecosystems. Additionally, volcanic eruptions can also affect global climate by releasing gases and particles into the atmosphere, leading to changes in temperature and weather patterns.