Because they have a lot of electrons associated with hydrogen <span />
Answer:
Explanation:
Nucleic Acids. There are two types of nucleic acid and they are DNA and RNA. DNA is the basic instructions for living things. It is passed down from parent to offspring and is found in the nucleus of the cell. RNA is very important for making proteins in a cell and can be found floating around in the cytoplasm of a cell.but mainly regulates cell processes
Answer:
d.The transferred traits were heritable.
Explanation:
Griffith's experiments with S. pneumoniae were significant because they showed that traits could be transferred from one organism to another and these transferred traits are known to be as heritable traits. In another experiment carried out by Hershey and Chase experiment it was confirmed by the results that DNA is actually the hereditary material not the protein.
Answer:
The best answer to the question: Histone modification:___, would be: E: Can change over time in response to environmental cues, allowing genes to be turned on or off as needed.
Explanation:
Unlike what it would be believed, that cells are always in a constant state of gene expression, differentiation and cell modification, research has shown that this process is highly dependent on the environment on which a cell may be, even stem cells, and the availability of nutrients. This means that whenever a cell is in an environment that does not motivate proliferation, or differentiation, gene expression can be halted, and the entire process can be halted as well, until better conditions are reached. Science, however, cannot yet explain exactly how, when an environment becomes positive for genetic expression, and cell proliferation, the cell activates its gene expression. What is known is that the process begins by the acetylation of histones thanks to an incrase in acetyl-CoA when nutrients become available again.
Answer:
Seed
Explanation:
Seed is a small embryonic plant that is covered in a protective covering called seed coat. The formation of seed is an evolutionary success of plant because it enables them to survive harsh conditions and grow well when environmental conditions become appropriate.
Three main parts of a seed are:
Seed coat: It consists of one or more layers or covering that protect the embryo from environmental hazards.
Embryo: It is a small developing plant containing cotyledon (it can be mococotyledonous or dicotylydenous) that form small leaves , a plumule that becomes a shoot in future and a radicle that becomes root in future.
Endosperm: It is source of food for embryo and it mainly consists of starch based compounds.
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