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Irina18 [472]
3 years ago
7

What were the three major observations that charles darwin contributed to evolution?

Biology
1 answer:
Volgvan3 years ago
6 0

Answer:

The 3 major observations were:

1. More individuals are produced each generation that can survive.

2. Phenotypic variation exists among individuals and the variation is heritable (through parents' genes).

3. Those individuals with heritable traits better suited to the environment will survive.

Explanation:

Charles Darwin was a British naturalist who proposed the theory of known to everyone as  'The Theory of Evolution' through natural selection.

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How is the variation in color and markings beneficial to the orchid plant?
masha68 [24]

The variation in color and markings is beneficial to the orchid plants because it helps the flowers pollinate efficiently (Option C). It is an adaptation.

<h3>What is an adaptation?</h3>

An adaptation is an evolutionary trait that allows an organism to take advantage of survival and/or reproduction.

Orchid color can attract pollinators by mimicking flowers of plant species that live in the same area.

It is an adaptation known as mimetism, which allows them to take an evolutionary advantage.

Learn more about adaptation here:

brainly.com/question/29594

3 0
2 years ago
In a hypothetical population of plants, flower color is determined by a single gene with two alleles. In a population of 500 pla
Dvinal [7]

Answer:

Phenotype genotype Number of individuals

Red RR 245

Pink Rr 210

White rr 45

Number of alleles in total

R = 245 + 245 + 210 = 700 ---> 700/1000= 0.7 R frequency

r = 210 + 45 + 45 = 300 -----> 300/1000 = 0.3 r frequency

Predict (Hardy Weinberg) genotype frequencies=

p^2 + 2pq + q^2 = 1

p= 0.7

q=0.3

0.49 + 0.42 + 0.9 =1

According Punnett Squares in F1 we have=

Rr* rr = Rr 50% and rr 50%

4 0
3 years ago
BRAINLIESTTTT ASAP!!!
-BARSIC- [3]

The moon has a higher maximum surface temperature compared to Earth (253 degrees of moon to 136 degrees of Earth), but this also depends on night (which is colder) or day (which is hotter).

The moon has such extreme temperatures because it has no atmosphere that can "reflect" some of the heat from the sun, whereas the earth does.

6 0
3 years ago
Read 2 more answers
Which of the following statements are true for both the recrystallization and replacement modes of preservation? Choose one or m
vladimir2022 [97]

A similarity in both recrystallization and replacement modes of preservation is that delicate tissue and organs are not preserved.

<h3>What are recrystallization and replacement modes of preservation?</h3>

Recrystallization is a mode of preservation of fossils in which the internal structure of the fossils is changed by addition of more minerals to form larger crystal of the same material.

Replacement is a mode of preservation in which new material replaces the original material in the fossil.

In both methods of preservation, delicate tissue and organs are not preserved.

Therefore, a similarity in both recrystallization and replacement modes of preservation is that delicate tissue and organs are not preserved.

Learn more about fossils preservation at: brainly.com/question/2023023

#SPJ1

4 0
2 years ago
What is the significance of chitin in arthropods? A. Chitin is a storage carbohydrate that forms their exoskeleton. B. Chitin is
Kay [80]
C is the answer I believe
6 0
3 years ago
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