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anyanavicka [17]
3 years ago
9

Which of the following is an example of a trace fossil?

Biology
2 answers:
Dafna1 [17]3 years ago
3 0
The answer to your question isFossilized dung
AleksAgata [21]3 years ago
3 0

Answer:

B. Fossilized dung

Explanation:

Trace fossil- a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself.

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The fluid surrounding the organelles of a cell is the —
mario62 [17]

Answer:

cytoplasm

Explanation:

8 0
3 years ago
If the extracellular fluid has an excess of sodium ions, a. sodium ions move into cells b. intracellular fluid moves to the outs
Mandarinka [93]

Answer:

b. intracellular fluid moves to the outside of cells

Explanation:

The presence of an excess of sodium ions in the extracellular fluid would make it hypertonic with respect to the intracellular fluid. The concentration gradient would drive the intracellular fluid towards the outside of the cell to balance the concentration of the fluids on either side. The passive movement of fluids occurs across the cells and is driven by the concentration gradient only. The biological membranes are permeable for fluid movement such as the movement of water across it.

6 0
3 years ago
What is the meaning of sewage system<br><br>Sewage System​
Mashcka [7]
1. sewage system - facility consisting of a system of sewers for carrying off liquid and solid sewage. sewage works, sewer system. facility, installation - a building or place that provides a particular service or is used for a particular industry; "the assembly plant is an enormous facility"
8 0
2 years ago
Read 2 more answers
Which rock is not a metamorphic rock?<br><br> phyllite<br><br> shale<br><br> slate
anastassius [24]

Answer:

Explanation:

Metamorphic rocks are those which have been changed from one form to another by the high pressure and temperature environment of the Earth. "Metamorphism" means the process of changing form.

Phyllite is a type of foliated metamorphic rock.

Slate is a, fine-grained, clayey metamorphic rock.

Shale is a parent rock to slate and phyllite.

Here is one source for a simple graph. (Copy and paste into browser)

http://hyperphysics.phy-astr.gsu.edu/hbase/Geophys/metamo.html

5 0
3 years ago
The human genome contains about 3 billion base pairs. During the first cell division after fertilization of a human embryo, S ph
Nataly [62]

Answer:

5556

Explanation:

If a DNA polymerase synthesizes in average 50 nucleotides/second, that means that in three hours (10800 seconds) it synthesizes about 540000 nucleotides.

However, if the human genome is composed of 3000000000 (3 billion) base pairs (nucleotids), the minimum number of DNA polymerases (working in the same number of origins of replication) to finish the duplication of all the genome in three hours is 5555,5. (3000000000/540000). As we know there is no half polymerase, so we round to 5556.

5556 molecules of DNA polymerases acting on 5556  origins of replication are needed.

7 0
3 years ago
Read 2 more answers
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