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raketka [301]
3 years ago
13

True or False: The amount of a radioactive element remaining in an object its measured. Based on the known half life of the elem

ent the amount remaining can be used to calculate how old the object is. HURRY!!!!!​
Biology
2 answers:
Oliga [24]3 years ago
7 0

Answer: FAISE

Explanation:

lions [1.4K]3 years ago
5 0

Answer:

True

Explanation:

All radioactive element have a specific property of reducing itself by half of its actual amount in a certain period of time.

Suppose, an element X has a half life of 3 years. This means that this element "X" will reduce its quantity by half after every three years.

Now , if a case in given in which it is specified that some "Y" grams of element "X" is found and the age of the substance in which this element "X" is found is to be determined.

Then by the under given relation the age of substance containing element X can be determined

N = N_0 * e^{-\alpha t}

Where "N" is the inital mass or atomic mass of X

N0 is the present mass of X

t is the age of substance

and \alpha is the decay constant i.e half life

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Which connects neurons and what chemicals help neurons communicate
Shkiper50 [21]
The neurons are connected, with a tiny gap between them called the synapse, by dendrites. Neurotransmitters are chemical compounds that carry signals across the synapse.
7 0
3 years ago
Read 2 more answers
In flowering plants one megaspore gives rise to _____ nuclei.
RUDIKE [14]

Answer:

eight haploid

Explanation:

Megaspore (macrospore) is a type of spore present in heterosporous (production of spores of two different sizes and sexes) plants.

During megagametogenesis, a single nucleus undergoes mitosis three times producing an eight-nucleate.

4 0
3 years ago
Which components would be found in a eukaryotic cell but not in a prokaryotic cell?.
tia_tia [17]

The component which would be found in a eukaryotic cell but not in a prokaryotic cell is the nucleus.

<h3>What is the difference between a eukaryotic and prokaryotic cell?</h3>

A eukaryotic cell is a cell that possesses a true nucleus surrounded  by a nuclear membrane.

Examples of a eukaryotic cell is animal and plant cells.

A prokaryotic cell is a cell that lacks a true nucleus.

Examples of a prokaryotic cell is a bacterial cell.

Therefore, the components which would be found in a eukaryotic cell but not in a prokaryotic cell is the nucleus.

Learn more about eukaryotic and prokaryotic cells at: brainly.com/question/2088739

6 0
3 years ago
Four genes (A, B, C, D) are on the same chromosome in the sequence D, A, B, C. The distance between A and B is 4 map units, betw
sweet-ann [11.9K]

Answer:

7%.

Explanation:

The recombinant progeny might occur due to the exchange of genetic material between non sister chromatids known as crossing over during the meiosis.

The chromosome sequence is DABC. A and B distance is 4 map units,  B and C is 2 map units,  B and D is 5 map units. The distance between A and D is 1 map unit that can be calculated by subtracting the distance between BD and AB ( 5-4). The CD map distance can be calculated by adding the distance between AD, AB and BC ( 1 + 4+ 2). The recombination frequency is equal to distance between them is 7%.

Thus, the answer is 7%.

8 0
3 years ago
How could the nervous system cause a skeletal muscle to produce the most forceful contraction it is capable of?
defon

By triggering action potentials from every single motor neuron that regulates the muscle at a rate that causes tetanus in every fiber.

<h3>What are motor neurons, and what are they used for?</h3>

The central nervous system includes motor neurons, which are cells that transmit instructions from the nerves and muscles that control our movements, speech, swallowing, and breathing.

<h3>What makes it a motor neuron?</h3>

Motor neurons (also referred to as efferent neurons) are indeed the nerve cells responsible for carrying signals part of the peripheral nervous system towards muscles to cause movement. Neurotransmitters are released by them to set off reactions that cause muscle movement..

<h3>In the body, how many motor neurons are there?</h3>

There are around 500,000 of them, carrying information first from CNS to peripheral effectors throughout the peripheral tissues but instead organ systems. Motor neuron axons, or efferent fibers, convey information away from the central nervous system..

To know more about neurons visit:

brainly.com/question/24217914

#SPJ4

4 0
1 year ago
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