Answer: A beta particle
Explanation:
A beta particle is simply a high energy electron that is emitted from the nucleus. It DOES NOT affect the mass number of radioactive element TC, but affects the ATOMIC NUMBER by increasing it by 1 in Ru.
Thus mass number 99 remain the same in TC and Ru, but Atomic number increases from 43 to 44 due to beta decay
So, a beta particle is missing
Answer:
C. The population of a community stabilizes and doesn't change in size or scope
Explanation:
The climax communities are the communities that have reached the optimal number of species, as well as the optimal number of individuals of the species in the environment in accordance to the available food sources and space. These communities are in a state of equilibrium. Basically, the ecosystem has just the right amount of species, and just the right number of individuals of the species that it can support. All these species interact with each other, benefit from each other, and contribute to the well being of the ecosystem, living in perfect balance. The climax communities also need time to be established, but they also are communities that have not experienced disturbances for quite some time.
When a protein is synthesized on fixed ribosomes, it is threaded into the lumen of endoplasmic reticulum (ER).
Every eukaryotic cell has an endoplasmic reticulum (ER). The ER is arranged systematically into a web-like maze of radiating tubules and flattened sacs stretching all over the cytosol.
The tubules and sacs are all believed to interlink, so that the ER membrane forms an extended sheet bordering a single internal space. This highly complicated space is known as the ER lumen.
The ER traps selected proteins from the cytosol during their synthesis.
The two kinds of proteins include:-
- transmembrane proteins, which are only partially moved across the ER membrane and are submerged in it, and
- water-soluble proteins, which are completely transported across the ER membrane and are discharged into the ER lumen.
To learn more about ribosomes here
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Answer:
The correct option is E: Limulus - Book Lungs
Explanation:
The structure of a book lung is made so as to maximize the efficiency of gaseous exchange in arachnids. An externally located structure, book gills, aids in this process. Limulus are horseshoe crabs that still makes use of book gills. Its a marine creature (an arthopod, to be specific) that has 5 pairs of book gills on its body.
Farmers should discontinue the use of Bt corn (genetically modified maize)as their negative affects on the health of the consumers have not been fully over ruled by the recent research. In my opinion, genetically modified crops, although, are resistant to various pests, should not be encouraged because of the toxic chemical contents used during their production. There's a strong likelihood of these toxic chemicals entering our food chain and also being harmful to other naturally growing plants, hence there's a need for more research before this idea is pursued.
