What enzyme works to add DNA to ends of chromosomes in rapidly dividing cells such as those found in an embryo, to prevent genes from being lost during replication?

a. DNA polymerase

b. histones

c. telomerase

d. chromatin

How does endosymbiosis play A role in evolution of prokaryotes and eukaryotes and how are mitochondria important to this evolution?

How many hours of activity should portion sizes for meals be enough to sustain for? a. 1 b. 2 c. 3 d. 4

As fluid moves through a vessel, which factors determine the flow resistance? (Select all that apply.) - the length of the vessel - the radius of the vessel - the viscosity of the fluid - the pressure exerted by the heart

Scientist from different fields work together to continually modify the chemical composition of antibiotic medicines this is to keep up with adaptive abilities of the pathogen antibiotics are intended to treat.

Which best determines the number of wolves that can live in an area?

Discuss how protein kinases function to produce signal amplification in a cell

What is the name of the process in which glucose is converted to pyruvic acid?

Self-fertilization is avoided in sponges because a. there is no way for sperm to enter the sponge. b. the sperm do not possess the enzyme needed to penetrate the egg. c. sperm and eggs are not produced at the same time. d.

In the measurement of blood pressure, what are the units expressed as?

A scientist is studying the respiration reactions carried out by a certain bacterium. Which of these would indicate that the respiration reactions occurring are anaerobic? A. Ethanol is produced. B. Ethanol is produced. C. Glucose is consumed D.