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just olya [345]
3 years ago
11

Which represents the cross between two parent plants if one is heterozygous

Biology
1 answer:
Alinara [238K]3 years ago
8 0
Yy.yy is your answer ^-^
Hope am right. Good Luck!
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A bacterial sample has a cell density of 1.85 x106 CFU/mL. What plate dilution should yield a countable plate? Which two dilutio
insens350 [35]

Answer:

Explanation:

Bacterial count in stock- 1.85x10^6 cfu/ml

Dilution methods

Take 100 uL or (0.1ml) from stock and add to 900ul (0.9ml) saline and mixed it- this makes 10^1dilution.

Now take 100ul from 10^1 dilution and add to next 900ul saline this is 10^2 dilution, similarly do upto 10^5 dilution.

Then take 100ul from 10^ 4 and 10^5 dilution seperately and plate on LB agar plate seperetely and count the colonies.

Cfu/ml formula= (No.of colonies x dilution factor)/0.1 ml

So suppose, 18 colonies formed on 10^4 dilution then total no. Of cells in stock will be 18x10^4/ 0.1= 18x10^5 cfu/ml.

If we dilute 10^4 or 10^5 that's leads to colony count of 18-19 colonies on 10^4 dilution while 2 colonies should come on plate of 10^5 dilution.

7 0
3 years ago
N important organelle found in eukaryotic cells produces ribosomal subunits from proteins and ribosomal rna, also known as rrna.
Fofino [41]
It's the nucleus or the nucleolus to be exact which produces rRNA which as a structural component of ribosomes.

Hope i helped!
5 0
3 years ago
Read 2 more answers
I have just been warned you guys! So how about I actually ask an academic question and then add that stuff at the end of it? Ok
DENIUS [597]

Answer: Commonly known as deadly nightshade, belladonna, devil's cherry, and dwale. One of the most toxic plants found in the Western Hemisphere, all parts of the plant contain tropane alkaloids – as do those of its equally deadly sister species A.

Explanation: It contains several toxic alkaloids including coniine and is poisonous to humans and livestock. Consumption of just a small amount of any part of the plant can cause respiratory paralysis and death. Poison hemlock, with its purple-blotched stems, can cause paralysis if ingested.

5 0
3 years ago
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I NEED HELP QUICK
g100num [7]

Answer:

hydrogen

Explanation:

4 0
3 years ago
Read 2 more answers
Briefly describe how lateral inhibition increases apparent contrast at edges. In your response be sure to discuss the role of li
rusak2 [61]

Answer and Explanation:

The retina covers the internal phase of the eye. It characterizes by its complex interaction between many morphologically and functionally different cells, which are located in many layers. The principal processing mechanism in the retina is lateral interactions among cells, and the most common lateral processing is lateral inhibition.

Photoreceptors are those cells that receive the light and translate the luminous signal into an electrical signal. These are the cones and sticks.

The horizontal cells intervene in the lateral spatial interaction between photoreceptors.      

Bipolar cells receive information from the photoreceptors and from the horizontal cells and transmit it to the most internal layers in the retina.

The retina is stratified into five layers. One of these is the external plexiform layer, a contact zone between photoreceptors, horizontal cells, bipolar cells, and other cells.    

In the vertebrates´ retina, the lateral inhibition is produced for the first time in the external plexiform layer, through the horizontal cells. These cells connect to photoreceptors, other horizontal cells, and bipolar cells. The connection between horizontal cells might reduce or amplify the photoreceptor answer, and this last one is transmitted by the bipolar cells to the interior of the retina. In photoreceptors, there are two connections to horizontal cells, a direct connection, and an indirect one. The connection between photoreceptors, horizontal cells, and bipolar cells is known as lateral inhibition. By this inhibition, photoreceptors allow the contrasting perception in an image. Lateral inhibition allows discriminating one stimulus from other stimuli, by enhancing contrast and definition. The inhibitory modulation is produced by the inhibitor neurotransmitter GABA.The spacial extension of lateral inhibition changes according to the adaptation to light. Gap junction between horizontal cells and between photoreceptors and horizontal cells might vary with the amount of light.                      

4 0
3 years ago
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