Tiktaalik is a transitional fossil which shows how fish evolved into amphibians and reptiles. So the correct option is B.
What is Tiktaalik?
Tiktaalik is a direct ancestor of tetrapods or four-legged animals. It is an extinct fish-like animal and it lived on earth 380-385 million years ago (Devonian period).
The word Tiktaalik is derived from the <em>Inuktitut</em> language which loosely translates to large freshwater fish. This animal had characteristics of both fish and tetrapod and is therefore called the link between these two kinds of animals.
The characters resembling fish are gills and scales and the characters resembling tetrapods are rib bones, movable neck and lungs. There are characters that are a mix of both tetrapods and fish. These are bones and joints in limbs but fish-like fins instead of feet or hands.
Read more about Tiktaalik, here
brainly.com/question/10138798
#SPJ1
The prey is likely to decrease/decline if the predator's population increases
Answer/Explanation:
(1) a mutation in the coding region, resulting in an inactive protein
To check to see if there is a mutation, you could extract the DNA from the cancer cells and then perform PCR to amplify the gene of interest. You could then perform sanger sequencing and compare the sequence to the normal gene to see if a mutation is present. To test the effect of the mutation, you would want to see if an active protein has been formed.
To see if a normal sized protein has been formed, you could perform a western blot, comparing the protein band to the WT protein band. If the protein is absent or much smaller, it is likely not a functional protein.
(2) epigenetic silencing at the promoter of the gene, resulting in reduced transcription.
To check for changes in the epigenetic landscape of the promoter, you could perform chromatin immunoprecipitation by extracting the chromatin from the tumour cells and using antibodies for different chromatin marks to see what has changed between the normal cells and the tumor cells. E.g. H3K9me3, H3K27me3. You would perform a pull down with the antibody of interest and then PCR for your promoter to specifically look at changes at that gene compared to normal cells. To test DNA methylation, you could perform bisulfite sequencing.
To see how transcription is affected, you could extract RNA from the tumor and normal cells, and compare the levels of RNA between the two samples by qRT-PCR
Electrons are being transferred to the rod therefore giving a negative charge
<u>Complete Question:</u>
Water pollution and air pollution in an area have been steadily increasing. What can students do to address these environmental hazards?
_______ to educate other students about the deteriorating environmental conditions and the steps needed to improve the area. Also, encourage other students to volunteer for workshops about _______.
1.
A. Pass Laws
B. Organize Seminars
C. Create a Tax collection program
2.
A. Recycling and waste disposal
B. Poaching
C. Deforestation
<u>Correct Option:</u>
<u>Organize seminars</u> to educate other students about the deteriorating environmental conditions and the steps needed to improve the area. Also, encourage other students to volunteer for workshops about <u>deforestation</u>.
<u>Option:</u> B and C respectively.
<u>Explanation:</u>
As the environmental conditions are deteriorating day by day, thus it is necessary to train to boost upcoming generation for preserving it in most appropriate manner. For such actions awareness is necessary which should be encouraged by some volunteers of non-profit organization, environment protecting units of state and central, etc to conduct seminar in colleges and schools for students to make them understand the need of plantation and disadvantages of deforestation. The pattern to aware them should be remarkable, in order to create huge impact on the new generations towards green land.
