Answer:
Nitrogen thet cannot be used by organisms. C.
Explanation:
Free nitrogen is simply molecular nitrogen (N2). Nitrogen, in its molecular form, consists of two nitrogen atoms bound together with a tripple bond. Because it is very stable, N2 is typically nonreactive, and takes a lot of energy to break them apart. Among these are the amino acids necessary for life to begin and which are the building blocks DNA is made from. Basically, any nitrogen that is in an organic compound is considered “fixed” nitrogen and N2 is considered to be “free” nitrogen
Answer:
Cellular respiration takes place in mitochondria of a cell, hence it is also known as power house of cell , because it gives us energy in the form of ATP molecule .
Answer:
Lysosomes are vesicles that create and transport enzymes to the endoplasmic reticulum. The rough endoplasmic reticulum synthesizes the enzymes. Also, ribosomes synthesize proteins.
Explanation:
Answer:
the correct answer is B it is changeable
Explanation:
Science knowledge may change due to the development of new technics for observing investigations also through new ways of thinking or framing the questions asked.
Answer:
two types
During meiosis without crossing over, the alleles of two genes located on each chromosome migrate together and stay attached. We obtain, therefore, gametes that are 100% "parental", subdivided into two types of gametes from the point of view of allele separation.
