How does the air in a bears fur insulate it during winter

Why do mountaineers become breathless as they reach high altitudes

Hey everybody i need with a biology question. all the gametes of isogamous organisms are genetically identical. true false

What is the purpose of transcription? a. to copy the nucleotide in dna b. to form rna molecules from dna c. to produce a nucleic acid sequence from an amino acid sequence d. to link amino acids together to form stands of protein