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Bezzdna [24]
3 years ago
7

Sometimes two phenotypically different populations interbreed to a limited extent, so that it is difficult to determine whether

they are clearly separate species. This is not a concern to scientists because this __________.
Biology
1 answer:
NeTakaya3 years ago
4 0

This is not a concern to scientists because this is an indication that a new species may be formed or in progress from the interbreeding.

Explanation:

We know that species are the populations that can mate to produce fertile and viable progeny.  Speciation occurs when new species is form by a population which has separated and become reproductively isolated.

The two dogs living in Africa and America can mate and produce healthy offsprings and they are phenotypically different.

The mating of horse and donkey are different species because they produce infertile mule.

When two population of species that are phenotypically different mate they have overcome the mechanism of reproductive isolation.

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What is the correct order of structures that a piece of food would encounter as it travels through the alimentary canal of a bal
kari74 [83]

The correct order of structures is mouth, oesophagus, crop, stomach(proventriculus), gizzard, intestine, and anus.

<h3>The digestive tract of birds</h3>

The digestive tract of birds starts from the mouth and ends at the anus.

As the food enters the oesophagus through the mouth, it is pushed down to the first stomach called the proventriculus.

Hydrochloric acid, mucus and a digestive enzyme, pepsin, are secreted by specialized cells in the proventriculus and start the process of breaking down the structure of the food material.

Food substances that are hard to digest are transferred to the gizzard. Nutrients are absorbed in the intestines and undigested food substances are removed through the anus.

Learn more about the alimentary canal here:

brainly.com/question/881890

4 0
2 years ago
Classify each nutrient as a macronutrient or as a micronutrient.
Olin [163]

Answer:

Macronutrient                  Micronutrient

carbohydrate                    vitamin A

protein                              sodium

fat                                      phosphorous

5 0
3 years ago
Which is not a likely economic tool to address environmental issues?
Elden [556K]

Explanation:

Policy-makers have two broad types of instruments available for changing consumption and production habits in society. They can use traditional regulatory approaches (sometimes referred to as command-and-control approaches) that set specific standards across polluters, or they can use economic incentive or market-based policies that rely on market forces to correct for producer and consumer behavior. Incentives are extensively discussed in several EPA reports

Two basic types of traditional regulatory approaches exist. The first, a technology or design standard, mandates specific control technologies or production processes that polluters must use to meet an emissions standard. The second, a performance-based standard, also requires that polluters meet an emissions standard, but allows the polluters to choose any available method to meet that standard. Performance-based standards that are technology-based, for example, do not specify a particular technology, but rather consider what available and affordable technologies can achieve when establishing a limit on emissions. At times, EPA may completely ban or phase out the use or production of a particular product or pollutant, as it has done with chlorofluorocarbons (CFCs) and certain pesticides. Regulations can be uniform or can vary according to size of the polluting entity, production processes, or similar factors. Regulations are often tailored in this manner so that similar regulated entities are treated equally. MARK AS BRAINLIEST IF IT HELPS

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2 years ago
Why do plant cells have chloroplasts, but animal cells do not
ad-work [718]
<h2>Mark me brianliest plz I really need it</h2>

Explanation:

<h2>In order to do photosynthesis, a plant needs sunlight, carbon dioxide (CO2) and water. Once the sugar is made through photosynthesis, it is then broken down by the mitochondria to make Page 2 energy for the cell. Because animals get sugar from the food they eat, they do not need chloroplasts: just mitochondria.</h2>
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2 years ago
What is the science of naming and classifying organisms based on genetic evidence
andrew11 [14]

Answer:

Taxonomy- The science of naming and classifying organisms based on structural comparisons and genetic evidence.

Explanation:

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