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KatRina [158]
3 years ago
13

What did scientists like Darwin use to group species before DNA? two sentences, please!

Biology
2 answers:
Vlada [557]3 years ago
6 0

Answer: Species May share the same anatomy. Also observing DNA can show likeness with one another.

Explanation:

Natasha_Volkova [10]3 years ago
3 0

They used to group organisms by watching their physical characteristics. For example animals with spines are grouped into vertibrates and organisms without spine are grouped into invertebrates . They also group organisms based on habitatats ( where the organisms live) . For example marine animals live in water and terrestrial organisms live in land. They grouped organisms based on their feeding behaviour. For example producers produce their own food.

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1.¿El ciclo del agua tiene un inicio específico?
raketka [301]

Answer:

1)El ciclo del agua no se inicia en un lugar específico, pero para esta explicación asumimos que comienza en los océanos. ... Corrientes ascendentes de aire llevan el vapor a las capas superiores de la atmósfera, donde la menor temperatura causa que el vapor de agua se condense y forme las nubes.

2)El sol, que dirige el ciclo del agua, calienta el agua de los océanos, la cual se evapora hacia el aire como vapor de agua. Corrientes ascendentes de aire llevan el vapor a las capas superiores de la atmósfera, donde la menor temperatura causa que el vapor de agua se condense y forme las nubes.

Explanation:

POR FAVOR REVISAME DE LA MANERA MAS INTELIGENTE BRAINLIEST

7 0
3 years ago
I WILL GIVE BRAINLIEST!!!
Nesterboy [21]

Answer:

25%

Explanation:

When looking at a pedigree remember that:

  • squares are males
  • circles are females
  • the solid colored figure represents an individual affected by a disease
  • the empty figure represents a healthy individual

Let us assign the symbol X⁺ to represent the dominant allele linked to the X-chromosome and expressing healthiness, and X⁻ to represent the recessive allele expressing the dissease.

According to this pedigree

  • I1 is a man affected by the disease, YX⁻
  • I2 is a healthy woman X⁺X⁻
  • we can see that among the progeny (generation II) there are two individuals affected (a boy and a girl) and one healthy girl. This means that the mother I2 is heterozygous for the trait.

So, having their genotypes we can know what are the probabilities of getting a son with DMD

Parentals)    YX⁻     x     X⁺X⁻  

Gametes)   Y     X⁻      X⁺     X⁻

Punnett square)

                        X⁺             X⁻

            X⁻      X⁺X⁻         X⁻X⁻    

            Y        X⁺Y           X⁻Y

F1)

  • The probabilities of getting a healthy daughter X⁺X⁻ are 25%
  • The probabilities of getting a healthy son X⁺Y are 25%
  • The probabilities of getting a daughter with DMD X⁻X⁻ are 25%
  • The probabilities of getting a son with DMD X⁻Y are 25%
7 0
3 years ago
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An egg is protected by its outer shell. However, the shell also allows moisture and air to pass through. Which cell structure pe
ElenaW [278]
A cell membrane would most likely be close to an egg structure. A cell membrane is a selective permeable to ions and organic molecules and controls the movement of substances in and out of the cell. 

The basic function of the cell membrane is to protect the cell from its surroundings. It consists of the lipid bilayer with embedded proteins.
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4 years ago
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Disease is the answer
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The ancient bacteria are members of the domain
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