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MissTica
2 years ago
9

An unknown chemical is analyzed and found to contain the bases thymine and guanine. This chemical is most likely tRNA. mRNA. DNA

. rRNA.
Biology
1 answer:
Verdich [7]2 years ago
7 0

Answer:

DNA

Explanation:

Thymine is one of the four nucleobases that pairs with adenine to make up DNA, also called 5-methyluracil. It is replaced by uracil to make RNA molecules during transcription.

Theferore the unknown chemical analyzed was DNA because thymine is found in DNA and not in RNA molecules.

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Un jardinero cruzó dos plantas de flores rosadas, con la esperanza de obtener plantas con flores del mismo color. Su sorpresa fu
Temka [501]

Answer:

Este es un ejemplo de dominancia incompleta. Es una ocurrencia genética que ocurre cuando un gen dominante no expresa su manifestación completa en el alelo recesivo en un alelo dominante heterocigoto.

Por lo tanto, ambos rasgos se manifiestan, lo que resulta en la combinación de los dos alelos para los colores (blanco y rojo). Se dice que el alelo rojo dominante exhibe un dominio parcial sobre el alelo blanco recesivo, y esto da como resultado el alelo completamente rosado.

De acuerdo con la ley mendeliana, las dos flores rojas son heterocigóticas. Por lo tanto, las flores rojas heterocigóticas dominantes deben ser R. El alelo blanco es recesivo (rr) enmascarado por el rojo R,

Sin embargo, cuando se cruzan los dos alelos heterocigotos rojos:

Los fenotipos están en forma de

RR, (1) rojo Rr Rr (2) rosa rr (1) Blanco.

Esto ocurre porque el alelo rojo dominante no era total / completamente dominante en el alelo recesivo blanco en cada uno, lo que da como resultado un alelo rosa (el tercer fenotipo)

This is an example of incomplete dominance.It is a genetic occurrence  which occurs when a dominant gene does not express it full manifestation on the recessive allele in an heterozygote dominant allele.

Therefore,both traits are manifested which results in the blend of the two allele for colors(white and red).The dominant red allele is said to exhibit partial dominance over the recessive white allele.And this results in the entirely pink allele.

Based on Mendelian law the  two red flowers are  heterozygotes .Therefore, Red heterozygote dominant flowers should beRr.The white allele is recessive(rr) masked by the R-red,

However,when the two red heterozygote alleles are crossed:

The phenotypes are in the form of  

RR,(1) red  Rr Rr(2) pink  rr(1)White.

This occurs because, the dominant red allele was not fully/completely  dominant on the  white recessive allele in each,which results in pink allele(The third phenotype)

Explanation:

4 0
1 year ago
Which two systems most directly interact in the fuzzy millipede's defense against ants?
Elanso [62]

Two systems most directly interact in the fuzzy millipede's defense against ants are :

<u>muscular and integumentary</u>

<u></u>

Explanation:

  • The fuzzy millipede, Polyxenus fasciculatus, is found in Texas and is preyed upon by most species of ants.
  • Most millipedes defend themselves with a variety of chemicals secreted from pores along the body, although the tiny bristle millipedes are covered with tufts of detachable bristles.
  • Due to their lack of speed and their inability to bite or sting, millipedes' primary defence mechanism is to curl into a tight coil – protecting their delicate legs inside an armoured exoskeleton.
  • Reproduction in most species is carried out by modified male legs called gonopods, which transfer packets of sperm to females.
  • Millipedes overwinter, so they may hide in cracks or crevices throughout the whole winter and emerge in the spring.
  • These insects live in dark, damp places and feed on decaying plant life, sometimes damaging crops. But they can serve a good purpose too.
  • To protect itself against the ants, it ejects fibers from a tuft located at the tail end of its body. When an ant attacks, the millipede flexes its back end toward the ant and wipes the tufts against it.

6 0
1 year ago
The only vertebrates in which blood flows directly from respiratory organs to body tissues without first returning to the heart
drek231 [11]

The answer is <u>fishes</u>. Fish are unique in the aspect that they are the only vertebrates that blood circulates directly from respiratory organs to body tissues without returning to the heart first.

4 0
1 year ago
To store strawberries in sugar syrup, Lucy placed them in a jar and covered them with sugar but did not add any water. Do you th
LekaFEV [45]
<span>Yes . the sugar will melt over time to form syrup *</span>
8 0
2 years ago
What is the main evolutionary advantage a plant gets from growing a bulb like an onion or tulip?
Debora [2.8K]

Answer:

it is D

Explanation:

It is trust me

4 0
1 year ago
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