Answer the following question given this paragraph: The placenta is a spongy mass of blood vessels. Some of the vessels come from the mother. Some come from the fetus. The placenta is attached to the inside of the mother's uterus. The fetus is connected to the placenta by a tube called the umbilical cord . The cord contains two arteries and a vein. Substances pass back and forth between the mother's and fetus's blood through the placenta and cord. Oxygen and nutrients pass from the mother to the fetus. Carbon dioxide passes from the fetus to the mother. Q: The fetus is connected to what by a tube called the umbilical cord? Choices: - Stomach - Intestines - Fallopian tube - placenta A:
placenta
(Question)
Answer the following question given this paragraph: Like other bryophytes, moss plants spend most of their life cycle as gametophytes. Find the sporophyte in the diagram. Do you see how it is growing on the gametophyte plant?. Q: Like other bryophytes, moss plants spend most of their life cycle as? Choices: - spores - copepods - bacteriophages - gametophytes A:
(Answer)
gametophytes
Ques: Answer the following question given this paragraph: Nucleic acids are biochemical compounds that include RNA (ribonucleic acid) and DNA (deoxyribonucleic acid). Nucleic acids consist of chains of small molecules called nucleotides. Nucleotides are the monomers of nucleic acids. A nucleotide is shown in Figure below . Q: What consist of chains of small molecules called nucleotides? Choices: - Atomic acids - structural acids - nitrous acids - nucleic acids A:
Ans: nucleic acids
(Q).
Answer the following question given this paragraph: Schrodinger developed an equation that could be used to calculate the chances of an electron being in any given place around the nucleus. Based on his calculations, he identified regions around the nucleus where electrons are most likely to be. He called these regions orbitals . As you can see in the Figure below , orbitals may be shaped like spheres, dumbbells, or rings. In each case, the nucleus of the atom is at the center of the orbital. You can see animated models of orbitals this URL: http://www. chemistry. wustl. edu/~edudev/Orbitals/movie. html . Q: What term did schrodinger use for regions around the nucleus where electrons are most likely to be? Choices: - arrays - isotopes - ellipses - orbitals A:
(A).
orbitals
Ques:Answer the following question given this paragraph: The elements in Group 2 (beryllium, magnesium, calcium, strontium, barium, and radium) are called the alkaline earth metals (see Figure below ). These elements have two valence electrons, both of which reside in the outermost s sublevel. The general electron configuration of all alkaline earth metals is n s 2 . The alkaline earth metals are still too reactive to exist in nature as free elements, but they are less reactive than the alkali metals. They tend to be harder, stronger, and denser than the alkali metals, and they also form numerous compounds with nonmetals. Q: The elements in group 2 are called what? Choices: - halogens - metal alloys - noble gases - alkaline earth metals A:

Ans:alkaline earth metals
Ques:Answer the following question given this paragraph: The velocity of an object can be found from a position vs time graph. On a position vs time graph, the displacement is the vertical separation between two points and the time interval is the horizontal separation. The ratio of displacement to time interval is the average velocity. This ratio is also the slope of the line. Therefore, the slope of the straight line is the average velocity. For the motion pictured above,. Q: The ratio of displacement to time interval is the average what? Choices: - acceleration - direction - speed - velocity A:

Ans:
velocity