An increase in biodiversity generally causes what?

When a helium balloon expands and the volume doubles what happens to the density of the helium inside it?

An adolescent with pneumonia is admitted to the pediatric unit. after his parents leave the unit for the evening, he tells the nurse he may have contracted human immunodeficiency virus (hiv).

What provides energy to muscles

Thymine makes up 28% of the nucleotides in a sample of dna from an organism. approximately what percentage of the nucleotides in this sample will be guanine?

In a unicellular organism, the cell membrane carries out a function most similar to which structure in a human? a. lung b. brain c. ovary d. heart

What characteristics do all archea and bacteria have in common? Choose ALL answers that are correct 1. Live in other organisms 2. have cell walls 3. exhibit identical biochemical makeup 4. have a single circular chromosome

Filtrate becomes less concentrated as it flows down the medullary collecting ducts. True or False

Roentgens are used to measure the amount of: A) uranium, B) fuel burned, C) radiation, D) hydrogen isotopes

It is a warm, summer night. The relative humidity is 100%. From dusk until dawn, the air temperature drops from 32˚C to 18˚C (89˚F to 64˚F). What would you NOT expect to see in the morning? A: Clouds B: Frost C: Thunderstorms D: Dew

Radioactive isotopes Radioactive isotopes are never incorporated into organic compounds. do not occur naturally. are frequently added to foods as nutritional supplements. can be used in conjunction with PET scans to diagnose diseases.