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3 years ago

What material is compressed underground to form fossil fuels

Biology

2 answers:

Lana71 [14]3 years ago

6 0

Its dead plants and animals

vesna_86 [32]3 years ago

4 0

Answer:

The correct answer is option A (Dead plants and animals).

Explanation:

Fossil fuels are hydrocarbon-containing materials like natural gas, fuel oil, coal which act as a source of energy. These fossil fuels are formed from the remains of dead animals and plants of Carboniferous Period about 360 to 286 million years ago.

At that time the remains of plants and animals along with micro-organisms were decayed which were later covered by sand and silt and trapped it under the rocks. Over time heat and pressure compressed it and changed it into coal, oil and some trapped pockets of gases known as natural gas.

Thus, option A (Dead plants and animals) is the correct answer.

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Dendritic cells and macrophages kill by ingestion and destruction of particulate matter in a process called phagocytosis. Dendri

Korvikt [17]

Answer:

The statement is true

Explanation:

Hematopoietic stem cells give rise to myeloid progenitor and lymphoid progenitor and these two progenitors give rise to many immune cells. Dendritic cells are produced by both the progenitors and macrophages are produced by myeloid progenitor.

Both macrophages and dendritic cells are phagocytes. In phagocytosis, the foreing particles are injected by these phagocytes and they are destryoyed by the action of digestive enzymes present in these phagocytic cells.

Macrophages are present in tissue and if they are present in blood they are called monocytes. Therefore the statement is true.

6 0

3 years ago

You are doing lab work with a new species of beetle. You have isolated lines that breed true for either blue shells and long ant

aev [14]

Answer:

Due to the fact that when crossing the isolated lines, the F1 progeny expression resulted in all alleles having blue shells and long antennas, the dominant shell/color & length/antenna combination is:

"Blue Shell & Long Antenna"

8 0

3 years ago

Whitch of the following statements are true?

maria [59]

Answer:

All the statements are true except the second i. e. the soil quality in an ecosystem Does not matter as much as soil quantity.

Explanation:

In an ecosystem both quality and quantity of water is very important. If the quality of water is not suitable, that it contains polluted substances so the health of the organism such as fishes and other aquatic animals will adversely affected and sometimes dealth occurs and the ecosystem will be negatively affected.

5 0

3 years ago

Which of the following statements correctly describes the difference between the leading and the lagging strands of DNA during D

Mrrafil [7]

The answer is; A & C

The lagging strand is replicated in fragments called Okazaki fragments, each initiated by a primer. The fragments are later joined into one strand by DNA ligase. Replication occurs by adding nucleotides to the 3’ end of a preceding nucleotide. Because the lagging strand is antiparallel to the leading strand, the replication of the lagging strand is in the opposite direction as the replication fork direction. This is why the lagging strand is replicated in fragments because replication is being carried out by a single DNA polymerase (moving in the direction of the replication fork) per replication fork.

7 0

3 years ago

Why is everyone pretending Mrs. Dodds didn't exist?

frosja888 [35]

Answer:

It was a prank

Explanation:

everyone decided to prank percy and act like mrs dodds didnt exist

7 0

3 years ago