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3 years ago

What does the presence of homologous structures in different organisms suggest?

Biology

2 answers:

Georgia [21]3 years ago

8 0

The answer is “common ancestry”

andre [41]3 years ago

3 0

Answer:

The correct answer is option 2. Common ancestry.

Explanation:

The homologous structure is the structure that has a similar anatomical structure or underlying skeleton and can perform a different function in different organisms.

Homologous structures are similar in different organisms because they diverge from a common ancestor. All organisms that have homologous structures are considered to have a common ancestry. for example, human arm, dogs forearm, bat's wing all have a similar skeleton structure

Thus, the correct answer is option 2. Common ancestry.

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What contributed to the specification in Darwin's Finch theory

Keith_Richards [23]

Answer:

On his visit to the Galapagos Islands, Charles Darwin discovered several species of finches that varied from island to island, which helped him to develop his theory of natural selection.

Darwin's finches are a classical example of an adaptive radiation. Their common ancestor arrived on the Galapagos about two million years ago. During the time that has passed the Darwin's finches have evolved into 15 recognized species differing in body size, beak shape, song and feeding behaviour.

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2 years ago

Which exercise should be avoided if a client exhibits anterior pelvic tilt?

saw5 [17]

Anterior pelvic tilt leads to poor posture which increases the risk of knee pain, lower back pain/injuries, and other musculoskeletal disorders. It is a posture problem that affects almost anyone who sits a lot. If a client exhibits this disorder then the exercise of Calf raises should be avoided. Calf raises are methods of exercising the gastrocnemius, tibialis posterior and soleus muscles of the lower leg.

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3 years ago

What is the purpose of the plasma membrane?

k0ka [10]

The answer is d) it encloses specific structures

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2 years ago

*Fill in the blank*

Gekata [30.6K]

The noncyclic pathway is a FLOW of electrons from water, to photosystem II, to PHOTOSYSTEM I to NADPH. Energy is released as ELECTRONS move through the first electron transfer chain. This energy pumps HYDROGEN IONS into the thylakoid compartment, and then they power the formation of ATP as they flow back out. Sunlight provides the energy needed to keep this cycle going.

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Luminous energy is trapped by chlorophyll in Photosystem II.
When the pigment molecules absorb light, electrons provided by water molecules get in a higher energy level.
The excited electrons go through the electron transport chain from Photosystem II to a less energetic level in photosystem I.
<em>When the excited electrons leave photosystem II, they are replaced by new electrons extracted from the water molecules. </em>
Luminous energy absorbed move the electrons from the photosystem I to another electron acceptor, from where they get transported again and used to produce NADPH molecules.
<em>When electrons leave Photosystem I, they are replaced by new electrons coming from photosystem II. </em>
When the water molecule breaks down, hydrogen ions remain in the thylakoid lumen, from where they are pumped to the stroma by the ATP synthase.
The released energy is used to produce ATP molecules.
Hydrogen ions go back from the stroma to the thylakoid compartment.

The final products are oxygen, ATP, and NADPH.

--------------------------------------------

8 0

1 year ago

What is the temperature of the water at a cold seep?

valentinak56 [21]

Answer:

D. hot, but much cooler than at a hydrothermal vent

Explanation:

A cold seep is an area in the ocean floor where hydrogen sulfide, methane and other hydrocarbon rich fluids seep through thus forming a brine pool.

A cold seep is also called a cold vent and its temperature is not necessary lower than that of the surrounding water, but it is lower than that of a hydrothermal vent which is about 60 °C.

7 0

2 years ago

Read 2 more answers