Most bacteria have sizes that vary from 0.2 to 2.0 micrometer in diameter. Thus, for average sized bacteria, about 1000 bacteria can easily fix into a period at the end of a sentence.
On rare occasions, mutations can be beneficial to an organism.
Differentiation results in _____. A. specialized cells that perform specific functions
B. specialized cell that perform many functions
C. specialized cells that do not replicate
D. specialized cells that remain in the S phase
Structurally, how do smooth muscle cells differ from skeletal muscle cells?
Which biome covers the largest percentage of land
Your answer: Desert is the land biome that covers the largest percentage of land.
Desert/Tundra, since deserts are described as places with little precipitation, this would include places like Antarctica. It would also include the more known deserts like the Sahara.
Which description applies to alternative mRNA splicing?A-protein modifications such as addition of a functional group, or structural changes such as foldingB-heritable changes in gene expression that occur without altering the DNA sequenceC-a gene cluster controlled by a single promoter that transcribes to a single mRNA strandD-mRNA modifications such as additions of a 5'-cap and 3' poly-A tail and removal of intronsE-processing of exons in mRNA that results in a single gene coding for multiple proteins
The correct answer is E-processing of exons in mRNA that results in a single gene coding for multiple proteins.
Splicing is the process where introns are cut out of the mRNA so only the coding parts for proteins. In this way, genes can code for many proteins, depending on how the amino-acids are arranged.
Which of these diagrams best represents the steps in the formation of planets? a.) the sun is born, clouds rotate at high speeds, the clouds flatten into an elliptical disc, the planets are born. b.) the clouds flatten into an elliptical disc, the sun is born, the clouds condense, the planets are born
c.) the clouds of dusts and gases rotate at high speeds, the clouds condense, the sun is born, the planets are born
d.) the clouds of gases condense, the clouds rotate at high speeds, the clouds flatten into an elliptical disc, the planets are born
Answer: d.) the clouds of gases condense, the clouds rotate at high speeds, the clouds flatten into an elliptical disc, the planets are born
Planets are formed from proto-planetary disk.
Thus, the correct order is: d.) the clouds of gases condense, the clouds rotate at high speeds, the clouds flatten into an elliptical disc, the planets are born
b.) the clouds flatten into an elliptical disc, the sun is born, the clouds condense, the planets are born
You find a soldier lying face down. the soldier is conscious and tells you that he thinks he has injured his back. what should you do
A soldier lying face down with injuries his back injured must be handle with proper care and at the earliest. First of all I will look for the place at his back where he was injured and how much he was injured. And then very carefully lift him up and will look for a stretcher or gurneys and will look out for some help. I will try to arrange some vehicle and rush him to the nearest medical care.
The atomic number of fluorine is 9. How many electrons does an ion of fluorine have if it is represented by the symbol shown below? 19f1
Fluorine is a nonmetallic, diatomic gas with the symbol F and atomic number 9. Atomic number represents the number of protons in the atom. When F is neutral it means that the number of protons is equal to number of electrons. But, when F is an ion (F-), the it has more electrons (10) than protons, meaning its an anion.
It is known that atomic number is the number of protons present in an atom. Also, when an atom is neutral then number of protons equal number of electrons.
Hence, fluorine has atomic number 9 so there will be 9 electrons in a fluorine atom. It's electronic configuration will be .
So, in order to acquire stability fluorine atom will accept one electron from another atom. Therefore, it will result in the formation of ion.
Thus, we can conclude that there are total 10 electrons in a fluorine ion.
Which of the following processes occurs in prokaryotes but not in eukaryotes? a) translation in the absence of a ribosome b) transcription and translation occur simultaneously c) post-transcriptional splicing d) gene splicing.
b) transcription and translation occur simultaneously
The answer is B