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3 years ago

Early land animals had gills as well as lungs. Please select the best answer from the choices provided T F

Biology

2 answers:

Aneli [31]3 years ago

8 0

Its true I guess.............................

zheka24 [161]3 years ago

7 0

It is true, because when the first land animal evolved into land animals, they came from the oceans and lakes, and were water animals.

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All microorganisms that regularly populate the human body are referred to as the ___________________..

olga2289 [7]

Answer:

Human microbiome

Explanation:

The microbiota that aggregates in the human tissues including placenta, skin, lungs, saliva, and seminal fluid is the human microbiome. The microbiota can be virus, bacteria, fungi and protists.

The microbiome present in the human gut helps in digestion and also provides immunity. Microbiomes can be healthy or unhealthy and an imbalance of both can lead to weight gain, high cholesterol and blood sugar. These are the ecological communities that includes symbiotic, commensal and pathogenic microorganisms.

7 0

3 years ago

An engineer is building a new steel skyscraper in a area with a lot of Earthquakes, Compare two systems (fixed based system and

Leokris [45]

Answer:

<h2>Base isolated system</h2>

Explanation:

Fixed based system:-

A fixed-base building (built directly on the ground) will move with an earthquake’s motion and can sustain extensive damage as a result.

Base isolated system:-

A base isolation system is a method of seismic protection where the structure (superstructure) is separated from the base (foundation or substructure).

Hence,

A base isolated system is much more better in a area where there are a lot of earthquakes. 

5 0

3 years ago

Visible light _____. A)is not part of the electromagnetic spectrum B)has more energy than radio waves C)has longer wavelengths t

Reptile [31]

As far as I know of B would be the correct answer but i am not positive
Good luck!!

7 0

3 years ago

g The Electron Transport Complex (ETC) consists of four proteins. How many of these proteins directly contribute to the proton g

vladimir2022 [97]

Answer:

Three proteins directly contribute to the proton gradient by moving protons across the membrane

Explanation:

The Electron transport chain is a group of proteins and molecules incrusted in the internal mitochondrial membrane and organized into four complexes, I, II, III, and IV. These complexes contain the electron transporters and the enzymes necessary to catalyze the electron transference from one complex to the other. Complex I contains the flavine mononucleotide -FMN- that receives electrons from the NADH. The coenzyme Q, located in the lipidic interior of the membrane, conducts electrons from complex I and II to complex III. The complex III contains cytochrome b, from where electrons go to cytochrome c, which is a peripheric membrane protein. Electrons travel from cytochrome c to cytochromes a and a3, located in the complex IV. Finally, they go back to the matrix, where they combine to H+ ions and oxygen, to form the water molecule. As electrons are transported through the chain, protons are bombed through three proteinic complexes from the matrix to the intermembrane space. These are complexes I, III and IV.

6 0

2 years ago

Which of the following is an ethical consideration when genetically engineering crops?

seropon [69]

B-Bioprocessing for forestry products.

3 0

3 years ago

Read 2 more answers