Tag: biology

The sun is called the ultimate source of energy because it is the source of almost all energies of the earth. Plants convert light energy from the sun into chemical energy (food) by the process of photosynthesis. Animals eat plants and use that same chemical energy for all their activities.

Eduard Suess coined the term biosphere in 1875. According to him, bio referred to the life and sphere referred to everything around. Hence, biosphere includes atmosphere, lithosphere and geosphere.

The biosphere is the global sum of all ecosystems. It includes lithosphere, atmosphere and hydrosphere. Earth's lithosphere includes the crust and the uppermost mantle, which constitute the hard and rigid outer layer of the Earth.

RuBisCO is the most abundant protein on Earth, and mitochondria, chloroplasts, and peroxisomes are indeed excluded from the endomembrane system because they are not derived from the endoplasmic reticulum. Statement (a) is false because mesosomes are the plasma membrane outgrowths in prokaryotes, and (b) is false because the rough ER, not the smooth ER, is the site for protein synthesis.

Tigers are animals that consume other animals for energy, classifying them as carnivores. They are a type of consumer, not a producer or decomposer.

Plants are autotrophs that produce their own food through photosynthesis, making them the primary producers in an ecosystem.

Scientific estimates of the number of stars in the observable universe are typically in the range of 10^22 to 10^24.

A typical galaxy like the Milky Way is estimated to contain roughly 100 billion stars, which is 100,000 million.

The entire inhabited part of the earth and its atmosphere (including the living and non living components) forms the biosphere.

Neptune is the eighth and farthest known planet from the Sun in our solar system.