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Bess [88]
3 years ago
14

Which scientist hypothesized that more offspring were born in a population than could survive based on limited resources?

Biology
1 answer:
Fiesta28 [93]3 years ago
4 0
It was Thomas Malthus who first hypothesized that more offspring were born in a population than could survive based on limited resources. He concluded people would have to leave or die.
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In corn, the allele A allows the deposition of anthocyanin (blue) pigment in the kernels (seeds), while aa plants have yellow ke
lara31 [8.8K]

Answer:

<h2>A) Yes, 12 mu</h2><h2>B) AaWw</h2><h2>C) 0.25%</h2><h2 />

Explanation:

As given,

Allele A for  blue anthocynin.

aa for yellow kernel;

at  second locus;

W produce smooth kernel,

ww for wrinkled kernel;

Parents as given are:  AaWw and aaww

Progeny are:

blue smooth ( AaWw)= 1447;

blue wrinkle (Aaww)= 169;

yellow smooth (aaWw)= 186;

yellow wirnked (aaww)= 1510

a)

Recombinant progeny are  169+ 186= 355

non- recombinant progeny are = 1447+ 1510= 2957

so recombination frequency (RF)= 346/2957×100= 12.0054%

So a and w are linked genes.

They are 12 mu far away from each other.

b) Blue smooth parent= AaWw.

c) Aaww crossed with  aaWw

progeny are= AaWw, Aaww, aaWw, aaww,

They all are produced in same proportion =0.25% or 1/4.

5 0
3 years ago
The cichlid Cynotilapia afra, introduced at West Thumbi Island in Lake Malawi in the 1960s, has split into two genetically disti
Valentin [98]
<h2>Concept of biological species</h2>

Explanation:

  • Determine whether peoples from one populace will interbreed with people from the other populace when brought into one another's local environments
  • An animal category is a gathering of individual living beings that interbreed and produce fruitful, practical posterity. As indicated by this definition, one species is recognized from another when, in nature, it isn't feasible for matings between people from every specie to create prolific posterity
  • Individuals from similar species share both outer and inward qualities that create from their DNA. The closer relationship two living beings share, the more DNA they share for all intents and purpose, much the same as individuals and their families. Individuals' DNA is probably going to be more similar to their father's or mother's DNA than their cousin's or grandparent's DNA. Living beings of similar species have the most significant level of DNA arrangement and, subsequently, share attributes and practices that lead to effective propagation

3 0
3 years ago
Cells that do not contain nuclei are known as
tensa zangetsu [6.8K]
Prokaryotic cells because they don't have a nuclei.
3 0
3 years ago
Read the paragraphs and answer the question that follows.
Artemon [7]
We can infer of the two paragraphs that Geological movements are often hazardous when they happen quickly, and that the movement of plate boundaries does not always cause disaster.

The excerpt is telling us that "the <span>earthquakes caused a lot of damage, as well as dramatic changes to the local ecosystem", which is supporting the conclusion: "geological movements are often hazardous when they happen quickly." 
But is also telling us that "</span>The slip caused several rock formations and structures to develop cracks. However there was no large-scale disaster or disruption.", which is supporting the conclusion:  the movement of plate boundaries does not always cause disaster."
4 0
3 years ago
Read 2 more answers
Why the horses developed an oxygen debt when they exercised.
user100 [1]

Answer:

The horses developed an oxygen debt when they exercise because they suffered from Exercise-Induced Pulmonary Hemorrhage (EIPH).

Explanation:

A temporary shortage of oxygen in the body tissues during physical exertion such as exercise or a sudden burst of activity is referred to as oxygen shortage.

Horses (compared to humans) are uniquely designed to experience little or none of this.

When the body takes up oxygen, it reacts with glucose to produce energy. This is called Aerobic respiration.

There is also another procedure that the body uses to produce energy. This occurs when glucose is broken down in the cells. After this happens, lactic acid is created but cannot be stored in the body and must be expelled.

This interval when energy is produced without the presence of oxygen is called "oxygen debt".

When a horse is fit, its breathing quickly returns to normal. The longer the time taken for the breathing to return to normal, the less fit the horse is.

One of the factors that can reduce the fitness of a horse is the Exercise-Induced Pulmonary Hemorrhage (EIPH).

This occurs when blood vessle in the lung ruptures causing blood to bleed into the airways. So blood occupies space where oxygen should have. This reduced the amount of oxygen delivered to the blood stream. Hence the oxygen debt takes longer to be repaid.

Cheers

6 0
3 years ago
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