Which of the following statements about terrestrial biomes is true ? A. All biomes not dominated by trees typically exhibit considerable seasonality in either temperature, precipitation, or both B. All biomes not dominated by trees have their primary production limited by a relative scarcity of water. C.One way in which tropical and temperate rain forest are different is that tropical rain forest have broad leaved evergreen trees and temperate rain forests have deciduous trees. D. Boreal forest and arctic tundra biomes are only found in the northern hemisphere. E. A & B F. A & C G. A & D H. A, B, & C I. A, B, & D J. A,C, & D

The right answer is Ribosomes

The ribosome is a complex composed of RNA and ribosomal proteins, associated with a membrane (in the granular endoplasmic reticulum) or free in the cytoplasm. Common to all cells (prokaryotes and eukaryotes), the ribosome (and especially its composition) varies according to the organisms, even if it is always composed of two distinct subunits.

The ribosome is a huge ribonucleoprotein complex that allows the translation of mRNAs into proteins.

Final answer:

The organelle responsible for protein assembly is the ribosome. It exists either freely in the cytoplasm or attached to the rough endoplasmic reticulum, which also plays a role in protein modification. The Golgi apparatus further modifies and packages proteins, while the nuclear envelope regulates flow of substances.

Explanation:

Out of the organelles you listed: ribosomes, the Golgi apparatus, the nuclear envelope and the endoplasmic reticulum, it is the ribosomes that are responsible for protein synthesis. Ribosomes can either be found freely in the cell cytoplasm or attached to the endoplasmic reticulum (ER), forming what is known as the rough endoplasmic reticulum (RER). The ER, specifically the RER, plays a role in further modification of proteins. Meanwhile, the Golgi apparatus is involved in further protein modification and packaging, and the nuclear envelope acts as a barrier between the nucleus and the cytoplasm, controlling the flow of substances in and out of the nucleus.

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Answer:

Graphite is the only allotrope of carbon which is acts as lubricant and it is soft in texture.

Option: B

Explanation:

The atoms of graphite are set in a hexagonal structure. Graphite is soft because the atoms are bounded by Van deer Waal forces which are week.

This graphite is called as dry lubricant as the carbon atoms are loosely packed and free to move hence, it is used as lubricant. As graphite is a dry lubricant this can be used where wet lubricant is not being used. It is only non-metal which is electrically conductive.  

Answer:D

Explanation:if I know ittttt

Answer:

Water scarcity is the lack of sufficient available water resources to meet water needs within a region. It affects every continent and around 2.8 billion people around the world at least one month out of every year. More than 1.2 billion people lack access to clean drinking water.[1]

Water scarcity involves water shortage, water stress or deficits, and water crisis. The relatively new concept of water stress is difficulty in obtaining sources of freshwater for use during a period of time; it may result in further depletion and deterioration of available water resources.[2] Water shortages may be caused by climate change, such as altered weather-patterns (including droughts or floods), increased pollution, and increased human demand and overuse of water.[3] The term water crisis labels a situation where the available potable, unpolluted water within a region is less than that region's demand.[4]Two converging phenomena drive water scarcity: growing freshwater use and depletion of usable freshwater resources.[5]

Explanation:

True

Science is often tainted by biases in the science community.