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Stells [14]
2 years ago
15

Why do you classify pteridophytes under Trachaeophyta?

Biology
1 answer:
JulijaS [17]2 years ago
3 0

Answer:Pteridophytes are called tracheophytes because they have vascular tissues

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For all questions, assume that you have genes for beak color, tail-feather length, and feather color all linked (located) on the
Effectus [21]

1. If we cross YyLl (heterozygous parent with dominant traits) with yyll (homozygous parent with recessive traits)

P:  YyLl  x  yyll

F1 generation: YyLl: 400 Yyll: 100 yyLl: 100 yyll: 400

Recombinant offspring are those children whose genes contain a non-parental allele combination  (neither allele group is directly inherited from either parent). This happens when genes are located on the same chromosome but are so far apart from one another so that their alleles get crossed over during meiosis. In this case, Yyll and yyLl are the recombinant.

2. Calculation of distance between Y and L.  

The numbers of the two recombinant types is 200 (100 Yyll + 100 yyLl) and 800 parental offspring.

Total number of offspring is 1000.

So: 200/1000*100=20 map units.

There is 20 percent recombinant offspring frequency.


7 0
3 years ago
Answers fast please!
raketka [301]

Answer:

1. Legislative Branch (Congress)

2. Executive Branch

3.Judicial Branch

4. Trade

5. Bicameral

Explanation:

5 0
3 years ago
Read 2 more answers
Why would a mutation in a somatic cell of a multicellular organism escape detection?
Mashcka [7]

When a somatic cell is mutated, none of the other cells in the organism mutate with it. Screenings usually detect mutations that are in numerous cells and not in just one. That is why a mutation in a somatic cell of a multicellular organism escape detection.

<h3>What are mutations?</h3>

A mutation in biology is an adjustment to the nucleic acid sequence of an organism's, virus's, or extrachromosomal DNA. DNA or RNA can be found in the viral genome. Errors in DNA replication, viral replication, mitosis, meiosis, or other types of DNA damage (such as pyrimidine dimers from exposure to ultraviolet radiation) can result in mutations.

These errors can then lead to error-prone repairs, particularly microhomology-mediated end joining, error-causing repairs, or errors during replication. Due to mobile genetic elements, mutations can also result from the insertion or deletion of DNA segment.

To learn more about mutations with the help of given link:

brainly.com/question/17031191

#SPJ4

5 0
1 year ago
When glucose is high, camp is _____ : cap _____ bind the lac operator, and rna polymerase _____ bind the lac promoter. high; doe
mote1985 [20]
When glucose is high, cAMP is low; CAP does not bind the lac operator, and RNA polymerase does not bind the lac promoter. CAP is only active when glucose levels are low, which means the cAMP levels are high, and therefore the lac operon can only be transcribed at high rate when glucose is absent.  The importance of this is that the bacteria only turns on the lac operon and start using lactose only after they have used up all the preferred energy source which is glucose. 
6 0
3 years ago
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What is a control group? Give an example.
Nady [450]
A control group is a group that does studies or Experiments that does not receive treatment by researchers and is then used as a benchmark to measure how the other tested subjects do. Ex: Experimenting Arizonas and water together.
8 0
3 years ago
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