Answer the following question given this paragraph: Nonvascular plants were the first plants to evolve. Compared to other plants, their small size and lack of specialized structures, such as vascular tissue, stems, leaves, or flowers, explains why these plants evolved first. The first nonvascular plants to evolve were the liverworts. The hornworts evolved somewhat later, and mosses apparently evolved last. Of all the bryophytes, mosses are most similar to vascular plants. Presumably, they share the most recent common ancestor with vascular plants. Q: What type of plants were the first to evolve? Choices: - vascular - kilocalorie - cocklebur - nonvascular A:
nonvascular
(Question)
Answer the following question given this paragraph: Not all hydrocarbons are straight chains. Many hydrocarbons have branches of C atoms attached to a chain. These branched alkanes are isomers of straight-chain alkanes having the same number of C atoms. However, they are different compounds with different physical and chemical properties. As such, they need different names. How do we name branched hydrocarbons? There are a series of rules for naming branched alkanes (and, ultimately, for all organic compounds). These rules make up the system of nomenclature for naming organic molecules. Worldwide, the International Union of Pure and Applied Chemistry (IUPAC) has developed the system of nomenclature for organic compounds. So these rules are sometimes called the IUPAC rules of nomenclature. By learning and applying these rules, you can name any organic compound when given its structure or determine the unique structure of a molecule from its name. You have already learned the basics of nomenclaturethe names of the first 10 normal hydrocarbons. Here, we will add some steps to the procedure so you can name branched hydrocarbons. First, given the structure of an alkane, identify the longest continuous chain of C atoms. Note that the longest chain may not be drawn in a straight line. The longest chain determines the parent name of the hydrocarbon. For example, in the molecule. Q: There are a series of rules for naming branched alkanes (and, ultimately, for all organic compounds). these rules make up the system of nomenclature for naming what? Choices: - non-organic molecules - typical molecules - oxygen molecules - organic molecules A:
(Answer)
organic molecules
Ques: Answer the following question given this paragraph: Q: Humans building communities to make survival easier is an example of humans as a species changing their what? Choices: - climate - instinctive behavior - evolution - environment A:
Ans: environment
(Q).
Answer the following question given this paragraph: Q: Newly formed what aggregates into threads that form the framework of the clot? Choices: - blood - collagen - plasma - fibrin A:
(A).
fibrin
Ques:Answer the following question given this paragraph: If a swimming pool and wading, both full of water at the same temperature were subjected to the same input of heat energy, the wading pool would certainly rise in temperature more quickly than the swimming pool. The heat capacity of an object depends both on its mass and its chemical composition. Because of its much larger mass, the swimming pool of water has a larger heat capacity than the bucket of water. Q: The heat capacity of an object depends on its chemical composition and what other property? Choices: - volume - concentrations - weight - mass A:

Ans:mass
Ques:Answer the following question given this paragraph: Covalent bonds form because they give atoms a more stable arrangement of electrons. Look at the oxygen atoms in the Figure above . Alone, each oxygen atom has six valence electrons. By sharing two pairs of valence electrons, each oxygen atom has a total of eight valence electrons. This fills its outer energy level, giving it the most stable arrangement of electrons. The shared electrons are attracted to both oxygen nuclei, and this force of attraction holds the two atoms together in the oxygen molecule. Q: What do covalent bonds give atoms a more stable arrangement of? Choices: - protons - neutrons - cell walls - electrons A:

Ans:
electrons