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Contact [7]
3 years ago
14

Sea lampreys were likely introduced to Lake Superior in ??

Biology
2 answers:
Firlakuza [10]3 years ago
8 0
The 1930s and the 1940s I think
grigory [225]3 years ago
5 0
The 1940 I think hope I am Right
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The portion of the biosphere that consists of all earth's land is called the _____
Marizza181 [45]
Lithosphere is the correct answer
cause hydrosphere is water
and stratosphere and atmosphere are part of the air
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3 years ago
What is the full form of UV rays?​
Irina-Kira [14]

Answer:

UV radiation: Ultraviolet radiation. Invisible rays that are part of the energy that comes from the sun, can burn the skin, and cause skin cancer. UV radiation is made up of three types of rays -- ultraviolet A (UVA), ultraviolet B (UVB), and ultraviolet C (UVC).

Explanation:

6 0
3 years ago
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Which words or phrases describe some advantages of nonrenewable resources? Check all that apply.
Zigmanuir [339]

Answer:

easy to produce, affordable, abundant​

Explanation:

A non-renewable resource is defined as the natural resources which are not ereadily replaced through natural means and it takes thousands of years for their renewal. Example of non-renewable resource include Fossil fuels such as natural gas, oil and coal.

<u>There are many advantages of non-renewable resources such as:</u>

1) Easy to produce: non-renewable resources are easy to produce because processing stations can be easily developed for refinement and distillation of non-renewable resources.

2) Affordable and abundant: non-renewable resources are affordable and abundant in the earth. for example diesel and oil are good choices for powering vehicles.

Hence, the correct options are easy to produce, affordable, abundant​.

7 0
3 years ago
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In Marker Analysis, how are STRs related to alleles? Be sure to define each term (STR and allele) and explain how the two result
Lisa [10]

Answer:

The number of STR repeats is unique and therefore it is considered as an allele of that <em>locus</em>

Explanation:

Short Tandem Repeats (STRs), also known as microsatellites or simple sequence repeats (SSRs), are short DNA sequences with a size of 1-6 nucleotide bases which may be many times repeated in tandem. STRs localize in specific regions of the genome (<em>loci</em>) and therefore they are molecular markers. Gel electrophoresis a technique used to separate DNA fragments based on their size. In consequence, the pattern of STR repeats or 'alleles' obtained by electrophoresis can be used to identify individuals. In a gel electrophoresis, STR markers produce different bands that run more slowly or faster on the gel in different lanes according to their size (e.g., more slowly >> higher size of the STR sequence), and thereby STR alleles are unique and serve to identify individuals.

3 0
2 years ago
A grandfather has an x-linked disease. His wife does not have the disease and she is not a carrier for it. What is the probabili
kotykmax [81]

There is 50% probability that their daughter's son will have the disease, because daughter chromosomes are XX , and the X from father will have x- linked disease, now in next generation the son will have XY chromosomes, Y is from father and X will from mother, now mother have two "XX", out of these two one carry x- linked disease, that means 50 percent chances of having disease in son.

3 0
3 years ago
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