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Andrews [41]
3 years ago
11

Which statements indicate what the fossil record suggests about evolution on Earth? Check all that apply.

Chemistry
2 answers:
Gennadij [26K]3 years ago
6 0

The following are the statements, which indicates that the fossil record suggests about evolution on Earth:  

1. Humans have only recently existed on Earth.  

2. The organisms originally lived only in Earth's water.  

3. The plants did not have flowers when dinosaurs existed.  

The fossil remains have been discovered in the rocks of all the ages. The simplest organisms fossils are witnessed in the oldest rocks, and the fossils of more composite species are found in the newest rocks. This supports the theory of evolution suggested by Darwin, according to which the simple life forms slowly gets evolved into more composite ones.  

mafiozo [28]3 years ago
3 0

Answer:

100% correct answer

Humans have only recently existed on Earth.

Organisms originally lived only in Earth’s water.

Plants did not have flowers when dinosaurs existed.

Explanation:

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ANTONII [103]

Answer:

d . H₂SO₄ + 2KOH → K₂SO₄ + 2H₂O

Explanation:

  • The given reactions are:

a . 2HgO → 2Hg + O₂,

It is a decomposition reaction, that HgO is decomposed to give Hg and O.

b . Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl,

It is a double replacement reaction where two salts replaces their cations and anions with each others producing 2 new salts.

c . Zn + 2AgNO₃ → Zn(NO₃)₂ + 2Ag,

It is a single replacement reaction, that Zn replaces Ag from its salt.

d . H₂SO₄ + 2KOH → K₂SO₄ + 2H₂O

It is acid-base reaction "neutralization reaction" where H₂SO₄ (acid) reacts with KOH (base) producing K₂SO₄ (salt) and water.

  • So, the right choice is:

<em>d . H₂SO₄ + 2KOH → K₂SO₄ + 2H₂O</em>

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3 0
4 years ago
All matter has ____. A.mass B.weight C.color D.volume btw it is multiple choice. please help​
Mama L [17]

Answer: mass

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8 0
4 years ago
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QUESTION 7 Can you use alligation for any type of liquid? ​
NeTakaya

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Yes you can use alligation for a type of liquid. Explanation: Alligation is an old and practical method of solving arithmetic problems related to mixtures of ingredients.

5 0
3 years ago
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ahrayia [7]

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How many electrons are present in an uncharged atom with its 1s, 2s, 2p, 3s, 3p and 4s subshells filled and with five electrons
marshall27 [118]

25

Explanation

The orbital quantum number of an atomic subshell determines the maximum number of electrons it can contain. For example:

  • Each s orbital (l = 0) holds up to 4 \; l + 2 = 2 electrons
  • Each p orbital (l = 1) holds up to 4 \; l + 2 = 6 electrons
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The atom in question here contains four fully-occupied s orbitals, two fully-occupied p orbitals along with 5 electrons in a partially-occupied d orbital. It thus contains

4 \times 2 + 2 \times 6 + 5 = 25 \; \text{electrons}


5 0
3 years ago
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