1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lady_Fox [76]
3 years ago
13

Which events contributed to life evolving on earth

Biology
2 answers:
strojnjashka [21]3 years ago
8 0

Answer:

I believe through 'Natural Selection'. This occurs through the following steps

1) Genetic Variation

2) Over-Production

3) Struggle for existence

4) Survival of the fittest

5) Advantageous characteristics passed on to offspring

Hope this answered your question.

dexar [7]3 years ago
6 0
<h3><u>Evolution of life:</u></h3>

The given below are the events that are involved in the evolution of life which includes climate variation, geographical events, major extinction, and changes in the position of the continents.

  • 4.6 billion years before, the earth is formed after bombardment with comets.
  • 3.8 billion years before, the formation of replicating molecules occurred.
  • 3.5 billion years before, the unicellular organisms formed and the photosynthesis started to occur.
  • 555 million years before, many marine living animals started to dwell.
  • 500 million years before, the vertebrate started to evolve from the invertebrates.
  • 450 million years before, the marine lives started to move to lands which are arthropods.
  • 420 million years before, the earth landscape started to change.
  • 360 million years before, the forest started to appear and four limbed animals started to dwell.
  • 248 million years before, the earth's largest extinction took place where 90% of marine lives and 70% of lives living in land has went extinct.
  • 225 million years before, the mammals and dinosaurs started to dwell.
  • 65 million years before, the dinosaurs went extinct; and bird and mammals survived.
  • 4 million years before, many mammals went extinct and ice age began.
  • 130,000 years before, cave man started to live and the initiation of modern human took place.
You might be interested in
Name two threats to biodiversity:
Stella [2.4K]
I really hope this helps!


The main dangers worldwide are population growth and resource consumption, climate change and global warming, habitat conversion and urbanisation, invasive alien species, over-exploitation of natural resources and environmental degradation.
6 0
3 years ago
A gene that affects hair length in dogs has two alleles. The allele for short hair (L) is dominant
Lelechka [254]

Answer:

This question lacks options, the options are:

A. Only recessive alleles are inherited from homozygous parents.

B. Dominant alleles grow weaker as they are passed from parents to offspring.

C. Only the parent with a dominant allele can pass that allele to offspring in sexual reproduction.

D. A heterozygous parent has an equal chance of passing either the dominant allele or the recessive allele to offspring.

The answer is D

Explanation:

This question involves a single gene coding for hair length in dogs. The allele for short hair (S) is dominant over the allele for long hair (s). This means that allele 'S' will always mask the phenotypic expression of allele 's' in a heterozygous state.

According to the question, two heterozygous dogs (Ss) were crossed to produce 6 shortt-haired offsprings and 2 long-haired offsprings. An heterozygous organism is that which contains two different alleles for a particular gene i.e. a combination of dominant and recessive alleles.

Based on this, during meiosis or gamete formation, an heterozygous dog (Ss) will produce gametes with the short hair allele (S) and long hair allele (s) in equal proportion i.e. 50-50. When the two gametes containing the recessive alleles (s) produced by each heterozygous parent fuses, an offspring with a recessive phenotype (long hair, ss) is produced.

Hence, a long-hair

phenotype can appear in the offspring of two short-haired dogs because a heterozygous parent has equal chance of passing either the dominant or recessive allele to the offspring.

6 0
3 years ago
Anatomy focuses on the function and vital processes of the human body. true false
Stolb23 [73]
I think it's True in not 100%
4 0
3 years ago
Read 2 more answers
The Sudan Red test tests for which macromolecule?
Zigmanuir [339]

Answer:

Sudan Red is used to test for Lipids.

Explanation:

5 0
2 years ago
What term BEST describes when evolution of different traits occurs in a recent common related species?
kondaur [170]

Answer:

natural selection would be the answer

Explanation:

That means that some of the animals would survive.

5 0
2 years ago
Other questions:
  • What are the two most important processes in the cycling of oxygen in and out of the atmosphere
    13·1 answer
  • What are the benefits of scientists using the metric system worldwide?
    7·2 answers
  • One of the factors that increases body heat during adaptive thermogenesis is the production of ___________ by skeletal muscle. t
    14·1 answer
  • How was the present day theory of evolution developed?
    12·1 answer
  • What is the best way to avoid bacterial<br> contamination?<br> food handling
    10·2 answers
  • BIOLOGY
    13·1 answer
  • Ariel was playing basketball. 1 of her shots went in the hoop. 2 of her shots did not go in the hoop. How many shots were there
    10·1 answer
  • Cell theory states all of the following, except
    12·1 answer
  • If blood is splashed in the eye or any mucous membrane, flush the affected area with running water for:
    15·2 answers
  • Why does the sky change colors at sunset?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!