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Fynjy0 [20]
3 years ago
10

Female starlings (a species of bird) that lay clutches of four or five eggs have more surviving young than those with either lar

ger or smaller clutches. This is an example of:
Biology
1 answer:
noname [10]3 years ago
6 0

Answer: stabilizing selection acting on clutch size

Explanation:

Stabilizing selection is a form of natural selection in which a particular non-extreme trait value stabilizes the population mean.

However, stabilizing selection also have influence on birds clutch size (i.e. the number of eggs laid by a female bird). This is because the female bird is required to lay many eggs in order to have increase number offspring. However, the number of eggs they laid is directly proportional to the degree of support they can render with their own resources.

Therefore, the female starlings typically lays a moderate amount of eggs in order to stabilize the number of offspring they can take care and hence, increasing their offsprings survival rate.

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How do dams create energy for cities nearby​
Luden [163]

Answer:

when water passes through turbines spin, which creates electricity.

Explanation:

Hydroelectric power is produced as water passes through a dam and into a river below. the more water that passes through the more energy is produced.

8 0
3 years ago
Cutaneous anthrax is Select one: a. found only in humans. b. transmitted by contact. c. a high mortality disease. d. seen in epi
geniusboy [140]

Answer: B transmitted by contact

Explanation:

Cutaneous Anthrax is spread by contact with the bacterium's spores, which often appear in infectious animal products. Contact is by breathing, eating, or through an area of broken skin. It does not typically spread directly between people. Risk factors include people who work with animals or animal products, travelers, postal workers, and military personnel.Diagnosis can be confirmed by finding antibodies or the toxin in the blood or by culture of a sample from the infected site.

7 0
3 years ago
Read 2 more answers
What structural component gives arteries the ability to passively adapt to changes in blood pressures that accompany the heartbe
Andrews [41]

Answer: elastic fibers

Explanation:

Elastic fibres are the essential durable component present in mammalian connective tissueand functions to provide proper pulmonary,  cardiovascular and intestinal system structure and function. Their structural function is to provide elastic recoil and resilience for the tissues.

Elastin fibers ahve two main including microfibrils and elastin containing fibrillin play a mechanical and structural role in the arteries, and their important function is to provide the tissues with resilience and elasticity.

Hence, elastic fibers helps arteries to adapt to changes in blood pressures that accompany the heartbeat.

5 0
3 years ago
How would low tide most likely negatively affect the abundance of aquatic organisms?
Art [367]
How would low tide most likely negatively affect the abundance of aquatic organisms?
:Low tide exposes aquatic organisms to air for extended periods of time.

Hope my answer helped!
6 0
3 years ago
Read 2 more answers
How do introduced species become established in a new ecosystem? Check all that apply.
ankoles [38]
1 - introduced to a habitat similar to their own
3 - outcompete native species 
4 - generally have no native predators 
6 - often have high reproductive rates
8 - can tolerate a range of conditions
3 0
3 years ago
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