The inherited disease in which hemoglobin molecules clump into long fibers, changing the shape of blood cells is?

A. Cystic fibrosis

B. Sickle cell disease

C. Huntington's disease

D. Klinefelter's syndrome

Which statement correctly describes transcription? A. RNA is the direct result of DNA transcription B. RNA transcription takes place in the cytoplasm of a cell C. Proteins are the direct result of RNA transcript D.

If oxygen supplies are depleted during exercise, the body will use anaerobic respiration to produce the energy being demanded. What effects might this have on the athlete? Explain your answer.

lants and animals do not operate independently of one another. In fact, it is how these organisms interact that often defines form and function.

What is the area between the lungs that contains the heart, aorta, venae cavae, esophagus, and trachea called?

What controls the passage of chyme from the last region of the stomach to the duodenum region of the small intestine?

Egg laying land animals have evolved to produce eggs with tough shells to ensure that

Which of the following statements describes a proton of an atom? A has a negative charge and is located in the nucleus. B has no charge and is located in the nucleus C has a positive charge and is located in outer energy levels.

What are reasons scientists use models? To study objects far away To study objects too large To study objects too small. To study objects easily found in a lab. To study events that take place over long periods of time.

1. true false Carbon atoms form the building blocks of most living things.

Inhibiting enzymes involved in cell wall synthesis leads to which of the following? A) cell death by osmotic lysisB) a reduction in protein synthesisC) the incomplete synthesis of the bacterial cell wallD) a reduction in the amount of usable energy