Which statement is true about DNA, traits, and chromosomes. A. Chromosomes contain many DNA that control traits and is made of genes.

B. DNA is made of genes, along which are many chromosome molecules that control traits.

C. Genes control traits and are located on the DNA which is made of the chemical called chromosomes.

D. Chromosomes contain many genes that control traits and are made of DNA.

i think it is dna, i'm not totally sure but i think it might be.

i don't know. if i were you, i would search it up online : d

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.