Ithink its the last one but im not 100% sure!

which of the following is true of a semiconservative model of replication

-each newly synthesized double helix of dna contains one new strand and one old strand.
-dna synthesized involves conserving only part of each od the original strands in a dna molecule.
-the original dna molecule is stored in the cell nucleus and severs as a template for creating copies containing two new strands.
-dna synthesis involves conserving one strand of a double helix of dna and discarding the other.

Salmonella typhimurium is a food-borne bacterial pathogen that can cause severe gastrointestinal disease. salmonella is often phagocytosed by macrophages that normally destroy bacterial pathogens, but this bacterium is somehow able to prevent the complete maturation of phagolysosomes. salmonella is able to tolerate the low ph of phagolysosomes, and in fact responds to the drop in ph by secreting toxins that interfere with other cellular responses. which of the following differences would you expect to contribute to the survival of a bacterium within an salmonella-containing phagosome, compared to a healthy phagolysosome? decreased activity of acid hydrolases increased activity of acid hydrolases decreased import of h+ ions increased import of h+ ions my guess is decreased activity of acid hydrolases but i'm not sure.

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

The transport tubes from food came down the plant are called?