Answer:
Carbon dioxide (CO2) is incorporated into a preexisting sugar molecule.
Explanation:
Photosynthesis is a metabolic process undergone by the cells of autotrophic organisms in order to synthesize their own food. The photosynthetic process occurs I two stages viz: light-dependent stage and light-independent stage. The light dependent stage produces the energy (ATP) and reducing agent (NADPH) needed for the second stage.
The light-independent stage, also called Calvin Cycle, is the second stage of the photosynthetic process. The Calvin cycle is the stage where the glucose sugar (food) is synthesized. The very first phase of the Calvin cycle involves the fixation of Carbondioxide (CO2) by a CO2 acceptor called Ribulosbiphosphate (RUBP), as catalyzed by RUBISCO.
Hence, Carbon dioxide (CO2) is incorporated into a preexisting sugar molecule represents the event that form part of the Calvin cycle. Other options are part of the light stage.
Answer:
The structure of ecosystems can be visualized with ecological pyramids, which were first described by the pioneering studies of Charles Elton in the 1920s. Ecological pyramids show the relative amounts of various parameters (such as number of organisms, energy, and biomass) across trophic level
Explanation: hope it helps
Answer: DNA has three components a phosphate group, a sugar deoxyribose and 4 nitogenous bases.
DNA has two important bonds that make up the DNA which are phosphodiester bond and hydrogen bonds.
Explanation:
The phosphate of the one nucleotide in DNA bonds with the 5 sugar (5' carbon) of the next nucleotide forming the PHOSPHODIESTER BOND which is a strong covalent bond.
The other bond in DNA is the hydrogen bonds which are among the nitrogenous bases.
There are four bases adenine,guanine,cytosine,thyamine
These bases are held together by strong hydrogen bonds.
Adenine and thyamine have two hydrogen bonds between them and cytosine and guanine have three hydrogen bonds between them.
These hydrogen bonds keeps the DNA helix in place.
Answer:
Herd immunity is a form of indirect protection from infectious disease that can occur with some diseases when a sufficient percentage of a population has become immune to an infection, whether through vaccination or previous infections, thereby reducing the likelihood of infection for individuals who lack immunity.
Explanation:
Vaccines create immunity without causing illness or resulting complications. Herd immunity makes it possible to protect the population from a disease, including those who can't be vaccinated, such as newborns or those who have compromised immune systems.