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goldenfox [79]
2 years ago
7

Scientists consistently link two catastrophic events with the five major mass extinctions recorded throughout Earth's history. T

hese two events are
A) global ice ages and the impact of asteroids.
B) the impact of asteroids and volcanic eruptions.
C) lack of atmospheric oxygen and volcanic eruptions.
D) global ice ages and the rise and fall of sea level.
Biology
2 answers:
ololo11 [35]2 years ago
8 0

The impact of asteroids and volcanic eruptions

Georgia [21]2 years ago
7 0
<span>Scientists consistently link two catastrophic events with the five major mass extinctions recorded throughout Earth's history. These two events are
A) global ice ages and the impact of asteroids. 
Global ice ages led to the extinction of many populations over time, whereas when asteroids hit Earth, dinosaurs disappeared, among other species.
</span>
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Cuantos codones codifican la proteiana valina
kicyunya [14]

Answer:

64 triplets or codons/64 tripletes o codones.

Explanation:

It is possible to order four different bases (A, T, C, G) in combinations of three into 64 triplets or codons.

Es posible ordenar cuatro bases diferentes (A, T, C, G) en combinaciones de tres en 64 tripletes o codones y solo como referencia futura use brainly.lat si planea hacer más preguntas en español porque ese es el dominio en español para este sitio web

6 0
2 years ago
What is true about elements and compounds? A. Elements contain two or more compounds. B. Compounds contain two or more elements.
spin [16.1K]

Answer: B) Compounds contain two or more elements

Explanation:

5 0
3 years ago
Based on your knowledge of energy flow and light absorption, which color(s) of light
Aleksandr-060686 [28]

Answer:

all except green

Explanation:

all except green because the plant is reflecting green light, not absorbing it :)

8 0
3 years ago
(c) Based on the data in Table 1, describe why the dominant alleles for body color and wing shape are the alleles that produce a
Brrunno [24]

Answer:

Check the explanation

Explanation:

Consider the below table of F2 data of phenotypic flies: we can reconstruct the table as seen in the second attached image below:

From the above observations it is clear the Gray body long wings and Ebony body vestigial wings are the parental combinations and that the Gray body vestigial wings and Ebony body long wings are the recombinants.

Also the ratio indicates that Gray body is dominant over ebony body and that long wings is dominant over vestigial wings.

here the genes for the two characters have shown independent assortment which means that the genes are unlinked if located on the same chromosome or are located  on different chromosomes.

Now F1 hybrid= GgLl (G for Grey and L for Long)

Cross between F1 hybrid and true breeding Gray vestigial (GGll)

GgLl x GG ll

Gametes-----------> GL Gl gL gl Gl

        GL                          Gl                      gL                  gl

Gl    GGLl                      GGll                  GgLl               Ggll

   (Gray long)      (Gray vestigial)     (gray Long)     (Gray vestigial)

Therefore the probability of getting the flies with gray body vestigial wings= 2/4= 50%

b) The reason why the students obtained the above given F2 results involving a cross between true breeding Gray body and long wings with true breeding Ebony body and vestigial wings is that the genes for the two charcters asssort independently in F2 generation and that the genes are not linked as:

Parents------------------> GGLL x ggll

Gametes -----------------> GL gl

F1---------------------> GgLl (Gray long but in heterozous condition)

Now GgLl x GgLl

Gametes GL Gl gL gl   GL Gl gL gl

Here gametes assorted independently and hence in F2 generation we got the above results (U can show the results in the form of punnett square.

4 0
3 years ago
Which two organelles are found in plant cells but not animal cells
Inessa [10]
A large central vacuole, and chloroplasts. 
8 0
3 years ago
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