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skad [1K]
4 years ago
6

BRIANLIESTTTT!

Biology
1 answer:
german4 years ago
3 0
A heterogeneous mixture is a mixture of substances. In this mixture, substances are not chemically bonded just mixed, they're only together.

Examples:

A bowl of different nuts - Many types of nuts together.
A puddle of mud - Water, sand, leaves
Dirt - a bunch of particles held together.

Hope it helped1
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3 characteristics of sponges
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They are multicellular, heterotrophic, they have no respiratory organs, and their digestion is intracellular!
4 0
4 years ago
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Which of the following is the quality of a good scientific hypothesis?
CaHeK987 [17]

Answer:

The correct answer is - option a. It should be testable in a valid period of time

Explanation:

A thought that presents a temporary clarification about a phenomenon observed by a scientist is a hypothesis. The fundamental highlights of a good scientific hypothesis are: testability and falsifiability  

A testable scientific hypothesis should answer the logical question. This is one that can be checked valid or bogus utilizing the information gathered or the experience gained.  

a good scientific hypothesis must be testable and falsifiable. We should have the option to test the hypothesis utilizing the techniques for science and in the event that you'll review Popper's falsifiability rule, it must be conceivable to accumulate proof that will disconfirm the theory on the off chance that it is surely false.

Thus, the correct answer is - option a. It should be testable in a valid period of time

7 0
3 years ago
2. What has happened to the level of carbon dioxide in the atmosphere in the past several
Alex

Answer:

Nov 23, 2020 · Levels of carbon dioxide (CO2) in the atmosphere hit a new record of 410.5 parts per million in 2019, and are expected to keep rising this year, the World Meteorological Organization (WMO) said in its annual Greenhouse Gas Bulletin on Monday. “We breached the global threshold of 400 parts per million in 2015.

Explanation:

i dont know this is the correct answer???/

8 0
3 years ago
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If the map distance between genes J and K is 20 map units and the map distance between genes K and L is 35 map units, what is th
Maslowich

Answer:

The map distance between genes J and L is 55 map units

Explanation:

Map distance between genes J and K = 20 map units

Map distance between genes K and L = 35 map units

Map distance between genes J and L = map distance between genes J and K + map distance between genes K and L = 20 map units + 35 map units = 55 map units

6 0
3 years ago
Some birds in a population have an allele for long beaks and others for short beaks. A drought has caused change in the ecosyste
valentina_108 [34]

<span>The birds with the longer beaks will be fittest in the environment post-drought because they will be able to gather resources (food) hence survive. This will enable these bords to reach reproductive again and pass down the genes. It is important to note that fitness in nature is determined by the capacity to reproduce.
</span>


<span />

<span>Natural selection will change the allelic frequency such that the allele for long neck will be more in the population while that of short beaks will reduce. This is because short beaks trait will not be able to reach reproductive age (due to starvation) because of the incapacity to gather food <span>resource hence their genes will keep reducing in the subsequent generations. 
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<span><span /></span>

<span>Natural selection is a natural selective force that acts on a population and results to variation (differential) in the survival of the individuals in the population due to variations in phenotypes in the population. The most successful traits (phenotype that is best suited for the environment) are able to reach reproductive age, find a mate and reproduce hence leave its genes in subsequent generations</span>




5 0
4 years ago
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