What forms of life were present during Earth's first age, the Hadean era?

A. Crustaceans and fish but no land animals

B. Bacteria

C. The same life that is present today

D. None

Wich part of the blood is correctly paired with its function? a - red blood cells - fight infection. b-. plasma - transports wastes and hormones. c-. platelets - produces antibodies d-. white blood cells - carry oxygen.

Which of the following conditions will cause a rock body to become deformed?

One difference between carbohydrates and lipids is that

Fracking is used to extract what? A) coal B) natura gas C) all of the above D) petroleum

How has the discovery of DNA affected the classification of protists? Select three options. Many scientists want to get rid of the kingdom Protista. Some organisms have been moved out of the kingdom Protista.

In which stage of pertussis is the characteristic whooping sound made? convalescence catarrhal paroxysmal prodromal

True or false: vaccines can only be used to prevent viral diseases.

PCR is a technique that: Select one: a. can produce many exact copies of segments of DNA b. virtually eliminates operator error from DNA analysis c. provides a statistical analysis of the nitrogenous-base pairings d.

Chordates are distinguished by four traits: pharyngeal gill slits, muscular tail, notochord, and dorsal nerve cord.

Which best describes a way in which phosphorus may enter into the phosphorus cycle