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son4ous [18]
3 years ago
13

Do predators really kill only the old and sick prey? What evidence is there for this statement

Biology
2 answers:
Georgia [21]3 years ago
4 0
No, but it is known that old/sick prey is much easier to catch. The evidence is that, say, there's no old and sick prey. The predator has to eat regardless, and whatever is there for it to take, it will. Think of a lion and a zebra, and the zebra is eating grass in the middle of a field. The lion is going to take that chance.
jok3333 [9.3K]3 years ago
3 0
Nope predator catches the preys they find not only the old and sick one but the old and sick prey would be catch more easily as compared to the healthy and strong ones
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If the entire population of the united states forms a human chain by holding hands, how many times can such a chain be wrapped a
IceJOKER [234]
The formula used can be found in Quora.com (population*average height)/Earth's circumference), gives the result of the number of the human chain.

If the average height of an American is 1.77m and the US population is  326, 292, 068 (June 2, 2017) and if everyone is already an adult. 

US population 326, 292, 068
Average height according to study
is estimated as the same as arm span  <span>1.77
</span>Earth circumference in meters: <span>40,075,000
</span>
<span>
(</span>326, 292, 068 people * 1.77m) / 40,075,000m = 14.411 times
7 0
3 years ago
The saturation of hemoglobin is __________% at the arterial PO2 of 95 mmHg, and is __________% at the venous PO2 of 40 mmHg.
ra1l [238]

The saturation of hemoglobin is <u>100% </u>at the arterial PO₂ of 95 mmg and is <u>75% </u>at the venous PO₂ of 40 mmHg

<h3>Saturation of Hemoglobin</h3>

The saturation of hemoglobin at the arterial PO₂ is 100 percent due to the constant supply of oxygen taken in from the environment. while at the venous PO₂ the hemoglobin is 75% due to the limited supply of oxygen.

Hence we can conclude that The saturation of hemoglobin is <u>100% </u>at the arterial PO₂ of 95 mmg and is <u>75% </u>at the venous PO₂ of 40 mmHg.

Learn more about Hemoglobin : brainly.com/question/10122738

7 0
2 years ago
Help please I'm so confused
Sergio [31]

Hi,

Attached is solution diagram. You can see that true breeding means both have same alleles for purple PP and white WW flowers.

They were crossed to produce hybrid plants that all had purple flowers PW because purple was the dominant trait.

However, upon self fertilization of those hybrid plants, both purple and white flower plants were produced in 3:1.

Hope it helps!

5 0
3 years ago
Which of the following is part of a clade believed to have died out, leaving no descendants?
galina1969 [7]

Answer:

Paranthropus robustus

Explanation:

2.5 million years ago some autralopithecines were identified by dating fossils from South Africa, meaning they lived a good period of time. Of these, Australopithecus africanus is well known and is a little closer to our species. Other fossils found in excavations in both southern Africa and eastern Africa have been found to be of more recent specimens 2.5 to 2 million years ago. These specimens were classified as Paranthropus robustus and Paranthropus boisei. These australopithecine species became extinct and left no current descendants.

8 0
4 years ago
A forensic odontologist examines the teeth of a skull and finds no baby teeth, no wisdom teeth, scarring in the rear jawbone, no
denis23 [38]
The correct answer is letter B, the age range of the skull is less than 10 years old. Teeth are also a form of bone that develop within the skull. Its structure helps archaeologists determine the age of fossils that they dug up from the soil. Children lack some prominent features compared to adults because their bodies are still growing and developing into maturity. 
4 0
3 years ago
Read 2 more answers
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