Pretty sure its true, because i cant think of how it could be false. Hope i helped
Answer: La mayoría de los procariotas llevan una pequeña cantidad de material genético en forma de una sola molécula, o cromosoma, de ADN circular. El ADN en los procariotas está contenido en un área central de la célula llamada nucleoide, que no está rodeada por una membrana nuclear.
Answer: Intraspecific competition
Explanation:
Intraspecific competition is a type of competition that occurs among organisms of the same species due to limited food resources.
Thus, the decline in available resource of the lake make frogs practice Intraspecific competition
Answer:
When fossil fuel is burned in a car engine, pollution increases in the atmosphere.
Explanation:
Burning of fossil fuels are the main reasons for increasing of air pollution. When fossil fuels burn, energy is produced with carbondioxide. Energy is used by the engine of vehicles for movement while carbondioxide gas is released in the atmosphere which increases pollution in the air. This carbondioxide gas is also responsible for climate change because it is a greenhouse gas which causes global warming.
<span>The living matter is composed of mainly six elements — carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. These elements together constitute about 90% of the dry weight of the human body. Several other functionally important elements are also found in the cells. These include Ca, K, Na, CI, Mg, Fe, Cu, Co, I, Zn, F, Mo, and Se. Carbon is the most predominant and versatile element of life. It possesses a unique property to form an infinite number of compounds. This is attributed to the ability of carbon to form stable covalent bonds and C—C chains of unlimited length. It is estimated that about 90% of compounds found in living system invariably contain carbon.Life is composed of lifeless chemical molecules. A single cell of the bacterium, Escherichia coli contains about 6,000 different organic compounds. It is believed that man may contain about 100,000 different types of molecules although only a few of them have been characterized.</span>