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Papessa [141]
2 years ago
8

The fossils found in the different layers of Earth are listed below.

Biology
2 answers:
ehidna [41]2 years ago
5 0

The answer is layer 4

Mnenie [13.5K]2 years ago
5 0

Answer:

Option (4)

Explanation:

According to the law of Superposition, the rocks that are present at the base are the older rocks and the rocks that are deposited on the uppermost layer are the younger rocks. The younging direction of the rock is towards upward.

From the given condition, four fossils are found from four layers, of which the bottom layer contains the oldest fossils and the top layer contains the youngest fossils. The fossil A is in the layer 1 (oldest), fossil B is in the layer 2, fossil C is in the layer 3 and fossil D is in the layer 4 (youngest).

So, from the Superposition law, the rock layer that is the topmost layer is the layer 4 which contains the youngest fossil (fossil D).

Thus, the correct answer is option (4).

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Observe the two plants. Which cellular change affected the structure of second plant?
OLEGan [10]

Answer:

The correct answer is option D which is release of water from the vacuoles.

Explanation:

The difference in second plant from the first one is rigidity. Second one is wilted and not rigid. This is due to the release of water from the vacuoles in the cell of plants.

Vacuoles are present in the center of plant cell. They are usually filled with water and provide structural support to the cell.

In the absence of water filled vacuoles, plants shoots are wilted as in case of second plant.

4 0
3 years ago
How are revolution and orbit alike?
irga5000 [103]

Answer:

Change in direction

Explanation:

"Rotation" refers to an object's spinning motion about its own axis. "Revolution" refers the object's orbital motion around another object.

7 0
3 years ago
Question 26
Anettt [7]

Explanation:

cholesterol helps keep the plasma membrane hydrophobic.

I think this is the answer but I am not sure if it's correct or wrong

but ik that plasma membrane has a little bit of hydrophobic and hydrophilic regions

3 0
2 years ago
New biosensors, applied like a temporary tattoo to the skin, can alert serious athletes that they are about to "hit the wall" an
Sergio [31]

Answer:

Here are the following options to complete the question

Which of the statements below is the best explanation of why athletes would need to monitor lactate levels?

A. During anaerobic respiration, lactate levels increase when muscles cells need more energy, however muscles cells eventually fatigue, thus athletes should modify their activities to increase aerobic respiration.

B. During aerobic respiration, muscles cells produce too much lactate which causes a rise in the pH of the muscle cells, thus athletes must consume increased amounts of sports drinks, high in electrolytes, to buffer the pH.

C. During anaerobic respiration, muscle cells receive too little oxygen and begin to convert lactate to pyruvate (pyruvic acid), thus athletes experience cramping and fatigue

D. During aerobic respiration, muscle cells cannot produce enough lactate to fuel muscle cell contractions and muscles begin to cramp, thus athletic performance suffers.

A is THE CORRECT ANSWER

A. During anaerobic respiration, lactate levels increase when muscles cells need more energy, however muscles cells eventually fatigue, thus athletes should modify their activities to increase aerobic respiration.

Explanation:

When the muscle cells undergoes anaerobic respiration, lactate are produced. Too much accumulation of lactate results in muscle fatigue. It is necessary for the athlete to prevent high accumulation by adjusting their exercise level

3 0
3 years ago
What is a DNA probe?
strojnjashka [21]

Answer:

In molecular biology, a hybridization probe is a fragment of DNA or RNA of variable length which can be radioactively or fluorescently labeled. It can then be used in DNA or RNA samples to detect the presence of nucleotide substances that are complementary to the sequence in the probe.DNA probes are stretches of single-stranded DNA used to detect the presence of complementary nucleic acid sequences (target sequences) by hybridization. DNA probes are usually labelled, for example with radioisotopes, epitopes, biotin or fluorophores to enable their detection.

spanish

En biología molecular, una sonda de hibridación es un fragmento de ADN o ARN de longitud variable que puede marcarse de forma radiactiva o fluorescente. Luego puede usarse en muestras de ADN o ARN para detectar la presencia de sustancias nucleotídicas que son complementarias a la secuencia en la sonda. Las sondas de ADN son tramos de ADN monocatenario utilizados para detectar la presencia de secuencias complementarias de ácido nucleico (secuencias diana) por hibridación Las sondas de ADN generalmente están marcadas, por ejemplo, con radioisótopos, epítopos, biotina o fluoróforos para permitir su detección.

Explanation:

4 0
2 years ago
Read 2 more answers
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