1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
andreyandreev [35.5K]
3 years ago
13

Surprisingly, whales have hind limbs (leg bones) that they do not use, but that are thought to be left over from an earlier ance

stor of theirs. This is an example of which type of structures?
Biology
1 answer:
pashok25 [27]3 years ago
7 0

Answer:

Vestigial organs

Explanation:

Vestigial organs/ structures are those parts of the body that have become redundant, weakened, or useless to the body as a result of prolonged inactiveness.

According to Charles Darwin's theory of evolution, he explains that parts of the body that are not used quite often do not develop any further, and as generations of offspring come and go, such parts become useless to the organism. This is the law of use/misuse of parts.

This is what happened to the whales. Over the years, the whales must have discovered that the legs were useless to them as they spent most of their time in the water. This led to the degeneration of such body part over thousands of generations, leaving them with just a faint trace of the hind limbs which were observed

You might be interested in
Precipitation and evaporation are important components of the
uysha [10]
Hey Vanelsa. Let me help you on this one.

In this question, we will need to fill a certain word in the blank at the end of this statement. Let's take a closer look at this sentence in order for us to get a correct answer.

Both precipitation and evaporation deal with certain actions that take place within water cycle - cycle in which water circulates around the liquid, gas, and sometimes, even solid form. 

In the water cycle, water turns into gas because of heat - this process is called evaporation. This gas goes up, and then, it's carried with the clouds. Once the gas form is cold enough, it will turn into water, and fall from the sky in form of the rain - this process is called precipitation.

I will be attaching image of the water cycle for you to better understand it.

Answer: Precipitation and evaporation are important components of the water cycle.


4 0
4 years ago
Who is my dad? Please help
Black_prince [1.1K]
I am am your dad I went to get milk
6 0
3 years ago
Read 2 more answers
Normal cells responds to contact inhibition. When they come into contact with other cells, they stop moving and dividing. This k
Dafna1 [17]

Answer:

Cancer is basically a disease of uncontrolled cell division. Its development and progression are usually linked to a series of changes in the activity of cell cycle regulators. For example, inhibitors of the cell cycle keep cells from dividing when conditions aren’t right, so too little activity of these inhibitors can promote cancer. Similarly, positive regulators of cell division can lead to cancer if they are too active. In most cases, these changes in activity are due to mutations in the genes that encode cell cycle regulator proteins.

Explanation:

4 0
3 years ago
Recall that photosynthesis consists of two sets of chemical reactions. Which of these describes the energy conversions that occu
Papessa [141]
<span>The answer to the question is A, light energy à chemical energy. The procedure of photosynthesis in plants includes a progression of steps and responses that utilization sun oriented vitality, water, and carbon dioxide to create natural mixes and oxygen.</span>
8 0
3 years ago
Read 2 more answers
SECRET13 or ANYONE PLEASE HELP ME CHEACK MY ANSWERS
quester [9]
“3rd eyelid” that covers the eyes, but is transparent -- J. Watch for obstacles and prey while still protecting the eyes

<span>Long eyelashes -- E. Keep desert sand out of eyes 
</span>
Eyes set on the side of the head -- I. Watch for predators approaching from the side or behind 

Eyes set in front -- G. “binocular” 3D vision to better hunt prey 

<span>Large amounts of body fat -- H. keep warm in an icy habitat 
</span>
<span>Staying under rocks at midday -- B. keep cool in a hot habitat 
</span>
Bright, colorful markings -- A. warn predators away by appearing toxic 

<span>Drab, brown coloration -- D. camouflage from predators in the dirt

</span>Singing a loud, complicated song -- F. attracting more mates than others 

<span>Remaining so still that breathing is not detectable -- C. prey will come right up to be captured</span>
4 0
4 years ago
Other questions:
  • The sun’s surface is made up mostly of _____.
    5·2 answers
  • I really need 5 sun drawings for the desert, please. I do not even understand what a sun drawing is, but I need one for an assig
    9·2 answers
  • What are two techniques used to restore biodiversity
    6·2 answers
  • ​basic units of the dna molecule composed of a sugar, phosphate, and one of four dna bases is called a(n):
    10·1 answer
  • What facilitates passive transport across a cell membrane
    13·1 answer
  • Which of the following may add salt to the ocean waters
    15·1 answer
  • Which of the following are possible conditions during an El Nino event?
    6·1 answer
  • Define sublimation<br>​
    15·1 answer
  • My Octopus Teacher <br> How does the filmmaker know when trust is obtained with the octopus?
    11·1 answer
  • Why do people think matter in conserved in cellular respiration
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!