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fiasKO [112]
3 years ago
13

Marsupials are found in North America and Australia, but they would not have been able to swim across the ocean. According to sc

ientists, how did this group of organisms come to live on two separate continents?
Biology
2 answers:
Pavlova-9 [17]3 years ago
6 0
Scientists said that it was because of airplanes
Virty [35]3 years ago
6 0
<span>The continents were once connected, and marsupials were able to migrate over the land.</span>
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Which RNA base pairs with the adenine in DNA?
rusak2 [61]

adenine (A) pairs with uracil (U); guanine (G) pairs with cytosine (C).


7 0
3 years ago
because you may come in contact with organisms you cannot see (microbes), what safety procedure must be followed?
Elan Coil [88]

Hello there!

Usually, the procedures you should follow is using hand sanitizer or just washing your hands. That can help remove some microbes, but it is inevitable to not get any germs on you

^Hope it helps

4 0
3 years ago
If you took dna samples from two strangers on a street,how similar would their dna be?
Verdich [7]

The correct answer is: about 99%.

The main difference between two random people’s genetic make-up issingle base pair differences, or polymorphisms (SNPs). There are about one SNP per 1000 bases. Since the human genome is about 3 Gbp long, about 3 million SNPs among two random people is present. SNPs may occur within coding sequences of genes, non-coding regions of genes, or in the intergenic regions.


5 0
3 years ago
Read 2 more answers
Imagine two populations of a fish species, one in the Mediterranean Sea and one in the Caribbean Sea. Now imagine two scenarios:
jasenka [17]

Answer:  (1) The populations breed separately.

Explanation:

The genetic diversity can be define as the total number of different types of genes is present in a particular species. Genetic diversity makes the way suitable for the survival of the population of species in changing environment.  

According to the given situation, if the two population breed separately then then no new genes will be added to the gene pool of the species and hence, the genetic diversity will be lost.

4 0
3 years ago
What are the different types of limiting factors found in nature?
disa [49]

1. the availability of food, water, shelter and space.

2. Common limiting factor resources are environmental conditions that limit the growth, abundance, or distribution of an organism or a population of organisms in an ecosystem. The limiting factor also causes competition between individuals of a species population.

Example: Space, food, or water.

3. Limiting factors, such as food, would sometimes cause one organism to kill another to survive or fight over that factor. But with space, it would get crowded probably.

4. ( i couldn't find anything about South America Ecosystems Interactive... sorry )

5. "Native people" are ethnic groups who are the original inhabitants or descendants of the original people.

Example: the Yanomami and the Tupi People of the Amazon.

6. I would say do an experiment or something???

7. A variable is any factor, trait, or condition that can exist in differing amounts or types.

8. The dependent variable is what is being measured in an experiment or evaluated in a mathematical equation. The dependent variable is also called the outcome variable.

9. A typical use of a control group is in an experiment in which the effect of a treatment is unknown and comparisons between the control group and the experimental group are used to measure the effect of the treatment.

Example: when testing for a new pill, one group is given the pill to see affects, one group (the control group) is given a placebo and is used to see what happens when given a placebo.

10. Changes in limiting factors will cause a population to decrease.

11. They are transmitted from indirect contact usually.

12. An animal or plant on or in which a parasite or commensal organism lives.

Example: When a human doesn't wash his/her hands and that makes someone else sick. Another one is since humans naturally have bacteria, some are bad and can cause a virus.

13. An infectious agent is something that infiltrates another living thing.

14. Lack of membrane-bound organelles, unicellular, and small.

15. cocci, bacilli, and spirilla.

16. Viruses can replicate only by infecting a host cell and they cannot reproduce on their own.

17. Influenza, HPV, and rabies.

18. Any of a group of unicellular, multicellular, or syncytial spore-producing organisms feeding on organic matter.

Example: Pink waxcap, coral tooth, and pig's ear. (this is not their scientific name haha)

<em>I hope this helps :D</em>


4 0
3 years ago
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