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liubo4ka [24]
2 years ago
15

5. Fish use ___gills________ to breathe underwater. (However, many species of lobe-finned fishes that evolved during the Devonia

n period also had _____lungs_______________.) 6. In fossils, what anatomical evidence indicates that gills were present
Biology
1 answer:
marusya05 [52]2 years ago
7 0

Answer:

During the Devonian period which occurs 375 million years ago, gills are present in the fossil of tetrapods.

Explanation:

Gills present in tetrapods which able the marine animals to breathe inside water but with the passage of time the sac which is present around the gills convert into lungs and these tetrapods are able to live on the land. Examples of tetrapods are frog, lion, birds and salamander etc.

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According to the article, how does human activity affect the availability of food for deer populations? What result does this ha
Nesterboy [21]

Answer:

Human activity affects the availability of food for deer populations in many ways. Hundreds of years ago, dear were very rare but now more civilization has occurred making more food for dear in the gardens outside of peoples houses. Also, people have started to kill organisms that they found harmful to themselves, causing the dear population not to decrease, but stay the same and reproduce.

Explanation:

Hope this helps!

4 0
2 years ago
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In an action potential, the current that flows down the axon of a neuron is generated by the movement of ______ across the membr
notsponge [240]
I think the correct answer is ions.
An action potential occurs when a neuron sends information down an axon, away from the cell body. A neuron that emits an action potential, or nerve impulse is said to fire. These action potentials are generated by special types of voltage hated ion channels that are embedded in the plasma membrane of the cell. 
4 0
2 years ago
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Cephlochordates have a backbone that extends from their tail to where? their gills their anus their heart their head
Lostsunrise [7]
Pretty sure it’s to their neck.
5 0
2 years ago
Scientists are studying diversity of disease prevalence in golden retrievers. What type of diversity are they studying? A. Ecosy
algol13

Answer:

my best guess would be d. genetic

Explanation:

because genetic diversity measures genetic variation within species.

4 0
2 years ago
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The DNA in a cell's nucleus encodes proteins that are eventually targeted to every membrane and compartment in the cell, as well
Rainbow [258]

Answer:

PFK: cytoplasm

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Explanation:

As described in the question, the enzyme phosphofructokinase (PFK) functions is a cells cytoplasm. Enzymes are proteins and proteins are made in the ribosomes of a cell. As ribosomes are present in the cytoplasm, hence PFK once made in the ribosomes will be released into the cytoplasm.

As for insulin, it will be made in the ribosomes. from there, it will move to the Endoplasmic Reticulum for packaging. Then to the Golgi complex for modifications and further packaging. Only after these stages, it will be ready to move out from where it is produces to areas where it has to be used.

6 0
2 years ago
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