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MariettaO [177]
3 years ago
13

Fossils up to 75,000 years old can be dated with ______.

Biology
2 answers:
kodGreya [7K]3 years ago
7 0
Fossils up to 75,000 years old can be dated with Carbon-14.
 
Radio isotopes can be used for the age determination of the fossils. Carbon-14 is a common isotope which is used for that purpose. But the half- life of the Carbon-14 is relatively small as 5730 years. That means the amount of Carbon-14 will be half after every 5730 years. Hence, decay is very fast. So Carbon-14 cannot be used forage determination which is more than 75000 years due to the low accuracy.
tester [92]3 years ago
7 0
Carbon-14

Hope this Helps!
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Crocodiles that ignore birds cleaning their teeth instead of eating them is an example of __________. a. parental care b. habitu
Nostrana [21]

The correct answer is Option (B) Habituation.

Crocodiles ignore the birds which clean their teeth instead of eating them. This is an example of habituation.

<h3>Why do crocodiles show habituation toward the birds which clean their teeth?</h3>

It's an evolutionary phenomenon that when a bird used to sit in a crocodile’s mouth, the crocodile didn't eat it, instead, the crocodile used to allow the bird to sit in the mouth and clean the teeth of the crocodile so that they can alive longer, whereas the birds could get the free food from the crocodile’s mouth. It is an example of the symbiotic relationship between the two.

So, the same is the case today, crocodiles are habituated to the fact that the birds will clean their teeth so instead of eating them, these birds are being ignored by the crocodiles.

To know more about crocodiles visit:

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5 0
1 year ago
What is the difference between casual observers and scientific observers?
babunello [35]
There are different types of observers. Casual observers differ from scientific observer. Seeing and observing are two different things. Not that everybody seeing is actually observing the thing.
A casual observer just sits back and watch for something to happen while a scientific observer comes up with some hypothesis to work on it. 
8 0
3 years ago
Read 2 more answers
Katherine and Amy are members of the same sorority at college and are members of the school's swim team. They have been trying t
aniked [119]

Answer:

Option (A).

Explanation:

Sociology may be defined as the subject that focus on the study of development and social interaction in society. Sociology is also known as the general science of the society.

Amy and Katherine are the member of same team and Amy shows fast development than Katherine. They both are competitor of each other. This is human behavior to jealous with the person that perform better than them. Here, the development of Amy makes jealous to Katherine and she starts disliking Amy.

Thus, the correct answer is option (A).

5 0
3 years ago
Cuanta poblacion tiene Janca
guajiro [1.7K]

Answer:

creo que es una población pequeña

Explanation:

7 0
3 years ago
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Cultures of a bacterial species were incubated on the shelf of a refrigerator, out on a lab bench top, on the shelf of a 37°C in
Oksana_A [137]

Answer:

D. Psychrophile

Explanation:

Psychrophiles or cryophiles are a type of extremophiles i.e. they live in extreme environment. They grow well in low temperatures ranging from -20 to +10 degree Celsius.

Here, the bacteria was incubated at different temperatures. It did not show growth at standard incubation temperature of 37°C which indicates that it might be an extremophile preferring either very hot or very cold environment. But it also did not show growth at 50°C which means that it does not survive well at high temperature.

Lab bench top has generally colder surface compared to the surrounding environment and a little growth was observed there which indicates that this bacteria might require cold temperature for growth. The result was finally confirmed with abundant growth observed inside refrigerator which is only possible if it is a psychrophile.

7 0
3 years ago
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