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3 years ago

I’m very confused. Please help fast.

Biology

1 answer:

zavuch27 [327]3 years ago

5 0

Polar bears? They have white hair so it’s the only one that makes sense to me

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You have just trypsinized your monolayer cells growing in a T25 flask. Once detached you resuspended all of your cells in media.

Serga [27]

Answer:

Final dilution is $\frac{1}{6.33}$

Explanation:

Given

Volume of suspension $= 3$ mL

Volume of subculture $= 1.5$ mL

Volume of fresh media $= 8$ mL

Final dilution

$\frac{1.5}{8+1.5}$

Final dilution

$= \frac{1.5}{9.5}\\\\= \frac{15}{95} \\= \frac{1}{6.33}$

8 0

3 years ago

We can determine the velocity of a wave when given the frequency and the

Maurinko [17]

Answer:

we can determine the velocity of a wave when given the frequency along with the wavelength.

Explanation:

velocity = frequency × its wavelength

3 0

3 years ago

Place the organisms in the correct locations in this food web.

Alexxandr [17]

Answer:

Explanation:

green plant beside mouse.......eagle by snake.......goat behind jackal............lion in front of jackal

8 0

3 years ago

A restriction enzyme: Please choose the correct answer from the following choices, and then select the submit answer button.

Dimas [21]

Answer:

e. All of the above.

Explanation:

A restriction enzyme or restriction endonuclease is an enzyme that nicks or cuts DNA on a specific location after recognizing a specific sequence.
Restriction enzymes are widely used in cloning and biotechnological procedures.
The step of recombinant DNA technology requires the acquisition of the gene of interest (GOI). This is done by cutting it out of the donor genome.
Restriction enzymes perform this task by cutting on specific sequences. One important characteristic of restriction endonucleases is that they introduce "sticky ends" or overhangs in the donor sequence so it can be easily incorporated into the vector.

8 0

4 years ago

During the production of gametes, the chromosomes of a cell have condensed, and the chromatids of homologous chromosomes are cro

snow_tiger [21]

Answer:

The correct answer will be the cell is in prophase I of meiosis and will enter metaphase I next.

Explanation:

Meiosis is a type of cell division which is involved in the formation of haploid gametes.

During meiosis the division of the genetic material is markedly observed and based on this meiosis is divided into 4 phases: prophase, metaphase, anaphase and telophase.

During prophase: the chromatin structure of DNA starts condensing to form chromatids which attaches to homologous chromatids and are known as sister chromatids. These sister chromatids exchange their genetic material via a process called called recombination or crossing over which takes place during pachytene stage of prophase I. After crossing over it is proceeded by the next stage that is metaphase I in which chromosomes gets aligned at the center of the cell.

Thus, the cell is in prophase I of meiosis and will enter metaphase I next is the correct answer.

7 0

4 years ago

Read 2 more answers