Biology Middle School

Using the concept of natural selection, explain how giraffes evolved to have long necks over time. Be sure to write out the 3 steps of natural selection.

Answers

Answer 1

Answer:

Giraffes probably used to have short necks. Over time, since the branches of trees or plants were out of their reach, they adapted to this by having a longer neck. Those with longer necks are able to reach the food and eat it that those with short necks could not. Obviously, those with longer necks are able to survive and therefore reproduce. Because of reproduction, they are able to pass on this characteristic that allowed them to survive on to their offspring. This leads to offspring doing the same and over time, affecting the entire population of giraffes and soon evolving giraffes. This is natural selection doing its work in the evolution of long necks in giraffes.

Explanation:

Variation.  Organisms (within populations) exhibit individual variation in appearance and behavior.  These variations may involve body size, hair color, facial markings, voice properties, or number of offspring.  On the other hand, some traits show little to no variation among individuals—for example, number of eyes in vertebrates.

Inheritance.  Some traits are consistently passed on from parent to offspring.  Such traits are heritable, whereas other traits are strongly influenced by environmental conditions and show weak heritability.

High rate of population growth.  Most populations have more offspring each year than local resources can support leading to a struggle for resources.  Each generation experiences substantial mortality.

Answer 2
Giraffes likely first had short necks and ate the leaves of small trees. As the trees and the ecosystem changed the giraffes were no longer able to reach these trees leaves. The giraffes with short necks then starved and died and the ones with longer necks got to eat and live to reproduce. This eventually led to the tall giraffes we have today.

Related Questions

PICTURE BELOW / Which phase of cell division is shown?

A. metaphase

B. anaphase

C. telophase

D. prophase

Answers

Metaphase I believe that is the answer to your question

The phase of cell division that is showing here is prophase. The correct option is D.

What is cell division?

Cell division occurs in two stages: mitosis and meiosis. When most people say "cell division," they're referring to mitosis, the process of creating new body cells.

Meiosis is the process by which egg and sperm cells are formed. Mitosis is a necessary process for life.

Cell division is the process by which new cells are formed in the body for growth, repair, and replacement. This process involves the division of nuclear material as well as the division of cytoplasm.

Prophase, prometaphase, metaphase, anaphase, as well as telophase are the stages. Cytokinesis is the final physical cell division that occurs after telophase and is thus sometimes considered a sixth mitotic phase.

Prophase is the phase that is shown in the image as it involves condensing of chromatids and movement if centriole to opposite pole.

Metaphase is the phase in which the chromosomes align at the equator and anaphase separate the chromatids and move towards opposite pole.

Thus, the correct option is D.

For more details regarding cell division, visit:

https://brainly.com/question/13312481

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How are the functions of the brain and heart different? (2 points)

a
The brain cleans the blood before it is distributed to all parts of the body, while the heart passes oxygen into the blood.

b
The brain pumps blood to all parts of the body, while the heart filters the blood before it is distributed to all parts of the body.

c
The brain reduces the sugar level in the blood, while the heart helps break down the food into smaller pieces.

d
The brain sends and receives messages through the spinal cord and the nerves, while the heart pumps blood to all parts of the body.

Answers

Answer:

D

Explanation:

I hope it helps because both things are true

D IS THE CORRECT ANSWER

Mr. Blast’s classes are studying different forms of energy and how energy travels through a medium. They learn that sound waves transfer energy through a material. Which of these materials could sound waves travel through? Choose the three that apply.
a
rock
b
outer space
c
air
d
water

Answers

The answer is C , watee
A,C,D. Rock, air, and water

Select the food chain that correctly relates the organisms from the primary consumer to the tertiary consumer
Grass, Lion, Antelope, Vulture
Grass, Antelope, Vulture, Lion
Grass, Vulture, Antelope, Lion
Grass, Antelope, Lion, Vulture

Answers

Answer:

Grass, Antelope, Lion, Vulture

Explanation:

The image explains it better than I can

Grassss, antbe lion,
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