Answer:

1 answer:

7 0

Answer: For the first question, altering land/habitats, modifying ecosystems - change the biogeochemical cycle. A list would be; Agriculture, Deforestation, Overpopulation, Plastic Production, Production of black carbon.

Secondly, the differences between deforestation & degradation is that deforestation is when forests is converted yo non-forest uses- for example, turning forest land into agriculture or roads. Degradation happens when forests lose their capacity abilities to provide goods for the nature & us humans.

Explanation: 1. These affect the ecosystem because in order for humans to survive, they use natural resources from ecosystems that harms them.

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What would a biochemist call the result of chaining many molecules together

maxonik [38]

The structure of a typical antibody molecule

Antibodies are the secreted form of the B-cell receptor. An antibody is identical to the B-cell receptor of the cell that secretes it except for a small portion of the C-terminus of the heavy-chain constant region. In the case of the B-cell receptor the C-terminus is a hydrophobic membrane-anchoring sequence, and in the case of antibody it is a hydrophilic sequence that allows secretion. Since they are soluble, and secreted in large quantities, antibodies are easily obtainable and easily studied. For this reason, most of what we know about the B-cell receptor comes from the study of antibodies.

Antibody molecules are roughly Y-shaped molecules consisting of three equal-sized portions, loosely connected by a flexible tether. Three schematic representations of antibody structure, which has been determined by X-ray crystallography, are shown in Fig. 3.1. The aim of this part of the chapter is to explain how this structure is formed and how it allows antibody molecules to carry out their dual tasks—binding on the one hand to a wide variety of antigens, and on the other hand to a limited number of effector molecules and cells. As we will see, each of these tasks is carried out by separable parts of the molecule. The two arms of the Y end in regions that vary between different antibody molecules, the V regions. These are involved in antigen binding, whereas the stem of the Y, or the C region, is far less variable and is the part that interacts with effector cells and molecules.

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3 years ago

18. In replication of DNA, the helix is opened and what is unzipped?

aalyn [17]

Answer:

B) Hydrogen Bond

Explanation:

Those are the bonds that the restrictive enzymes unzip and the bonds that hold the complementary bases.

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Define nucleus and its parts with a neat labelled diagram...

hammer [34]

Answer:

➢The structure of a nucleus encompasses the nuclear membrane, nucleoplasm, chromosomes, and nucleolus. The nuclear membrane is a double-layered structure that encloses the contents of the nucleus. ... Like the cell membrane, the nuclear envelope consists of phospholipids that form a lipid bilayer.

➢ Such nuclear pores are the sites for the exchange of large molecules (proteins and RNA) between the nucleus and cytoplasm.

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