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lesantik [10]
3 years ago
10

How do scientists believe the Earth formed???????

Biology
2 answers:
Ymorist [56]3 years ago
6 0

Answer:

Formation. When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Like its fellow terrestrial planets, Earth has a central core, a rocky mantle and a solid crust.

Mice21 [21]3 years ago
6 0
When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Like its fellow terrestrial planets, Earth has a central core, a rocky mantle and a solid crust.
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A litter of four kittens includes one with black hair and blue eyes, one with black hair and orange eyes, one with brown tabby h
Hoochie [10]

Answer:

Law of independent assortment

Explanation:

According to Gregor Mendel who he performed a performed a cross involving two different genes i.e. a dihybrid cross, he stated that the allele of one gene will get sorted into gametes independently of the alleles of the other gene. He called this the LAW OF INDEPENDENT ASSORTMENT.

He obtained a 9:3:3:1 ratio when he performed this cross, which was only expected if each gametes contained the two genes in a combined state i.e. the dominant allele for one gene is equally likely to contain a dominant or recessive allele for the other gene in a gamete.

In this case, it appears the black hair and blue eyes are dominant alleles respectively while the tabby hair and orange eyes are recessive alleles respectively. If these alleles assort independently and combine in different ways, it will give rise to diverse genotypes and phenotypes in the kitten as illustated in the different phenotypic expression of eye color and hair color in the kitten.

5 0
3 years ago
Which of the following is correct about a muscle contraction?
julia-pushkina [17]

Answer:

The correct answer would be "Myosin heads attach to sites on actin filaments".

The muscle cell or myofibril consists of two types of protein filaments namely; actin (thin filament) and myosin (thick filament).

The myosin heads attach to the binding sites on the actin filaments and pull it towards the M-line in order to produce contraction.

The hydrolysis of ATP provides energy for this contraction cycle.

3 0
3 years ago
Read 2 more answers
15
Anastaziya [24]
Oxygen,carbon dioxide,ATP, & water
7 0
2 years ago
The largest and most complex of microorganisms are _____.
Mrac [35]
It is Protozoa because it is not logical for it be any of the other. Hope this helped.
5 0
3 years ago
Earth's earliest atmosphere may have contained which components? 15.8
vivado [14]

Answer:

Only Water, Oxygen, Nitrogen and ammonia

Explanation:

8 0
3 years ago
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