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erica [24]
3 years ago
14

In which phylum do we first see tissue-level organization?

Biology
2 answers:
Sliva [168]3 years ago
4 0
Cnidarians were the first phylum that scientists saw tissue level organization in. Tissue level organization meaning cells all of one type start to function in a unified way.
statuscvo [17]3 years ago
3 0

Answer: The correct answer is- phylum- Cnidaria.

All living organisms are composed of building blocks termed as cells. Cells that perform similar functions are grouped together to form tissue.

The phylum where tissue-level of organization is seen first is Cnidaria. This phylum contains approximately 10,000 species ( such as jellyfish, sea anemones, corals).

Cnidarians have cells that are organized into two types of tissues, which occur in two layers. External tissue layer is ectoderm and inner tissue layer is endoderm.

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A rare genetic disease which is due to a recessive allele (a) and that is lethal when homozygous, occurs within a specific popul
valkas [14]

Answer:

40 individuals

Explanation:

The homozygous recessive percentage is equal to q2.

Recessive genotype frequency, q 2 is 1/1000000  = 0.000001  

therefore, q = \sqrt{q2}  = \sqrt{0.000001 }  = 0.001 =  allele "a" frequency  

and p + q = 1, thus, p = 1 – q = 1 – 0.001 = 0.999  

thus, the frequency of allele a = q = 0.001  and the frequency of allele A = p = 0.999

Carriers are heterozygous and are equal to 2pq.  

So, 2pq = 2  x 0.999 x 0.001 x  20,000 = 39.96 (round of to 40)

Hence, 40 individuals will be expected to carry the recessive allele.

5 0
2 years ago
All of the following are correct regarding hair growth cycle <br> except that
Andreas93 [3]

i think the answer is i dont know


6 0
3 years ago
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Which of the following methods do scientists use to measure the amount of carbon dioxide in the atmosphere?
slamgirl [31]

According to Jesse Kroll, an MIT professor of chemical engineering and civil engineering who specializes in atmospheric composition, the primary method used by scientists to quantify greenhouse gases in the atmosphere is spectroscopy. Thus, option A is correct.

<h3>What is the amount of carbon dioxide in the atmosphere?</h3>

Only 0.04% of the atmosphere is made up of carbon dioxide, and water vapor levels can range from 0% to 4%. However, while being the main greenhouse gas in our atmosphere, water vapor possesses “windows” that let some infrared light pass through without being absorbed.

Therefore, find a location outside with pure, unpolluted air, then use a special kind of flask to collect an air sample.

Learn more about atmosphere here:

brainly.com/question/1686797

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8 0
9 months ago
________________________ is without symmetry.
kondor19780726 [428]
Asymmetry is the lack of symmetry. 
4 0
3 years ago
List the<br> amino acids that are coded for by the codons<br> AGU, GGG, CCU, and GUG.
Schach [20]

Answer:

I think this would help

Explanation:

Good luck!

have a great day ahead:)

4 0
2 years ago
Read 2 more answers
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