Which class of vertebrates is considered to be the first to develop lungs, allowing them to become terrestrial organisms?

A) Reptilia

B) Aves

C) Mammalia

D) Amphibia

Que propiedades presentan los alquenos

Calculate what is the surface area to - valume ratio of a cube whose sides are 3cm long?

Your mother asks you to carry a load of wood to the fireplace and lower it to the hearth. In doing this you have used your legs as levers. Which statement describes this as a class three lever? Question 13 options: A.

Consider the genetic cross for sex in humans XX is female and XY is male a family has four children all girls

Why must reverse transcriptase be used to create a eukaryotic expression library? a. reverse transcriptase is only used to create prokaryotic expression libraries b. reverse transcriptase creates cDNA from mRNA in prokaryotes c.

Damage to which structures may result in a heart murmur?

How do humans effect the ecosystem

What are some examples of other substances eliminated by the kidneys? check all that apply?

Match the researchers with their discoveries. Demonstrated the phenomenon of transformation, but did not identify the transforming principle. Answer 1 Identified DNA as the genetic material in bacteriophages. Answer 2 Determined the structure of DNA.

A spaceship is designed to support animal life for a multiyear voyage to the outer planets of the solar system. plants will be grown to provide oxygen and to recycle carbon dioxide.