8. A caldera is a large volcano that forms at a divergent plate boundary. *

lilavasa [31]

Answer:

During the telophase stage, the spindle fibres lengthens more and the nuclear membrane reforms to form the nuclei enclosing the separated sister chromatids. And, later followed by cytokinesis which involves the division of cytoplasm and yields the 2 daughter cells

Explanation:

is this what u looking for?

if no i apologize...

7 0

3 years ago

The ____________ in the alveoli is 40 mm Hg and that of the blood entering the pulmonary capillaries is ____________ . This caus

Oxana [17]

Answer:

The PCO₂ -carbon dioxide partial pressure- in the alveoli is 40 mm Hg and that of the blood entering the pulmonary capillaries is 45 mmHg. This causes carbon dioxide to diffuse down its partial pressure gradient from the blood into the alveoli.

Explanation:

Gas exchange is a physiological process that involves the entry of oxygen into the body and tissues and the exit of carbon dioxide, a product of metabolic reactions.

At the pulmonary level, gas exchange occurs between the alveoli and the alveolar capillary, and the diffusion of gases across the alveolar-capillary barrier is dependent on a pressure gradient due to the partial pressure of gases.

In the case of CO₂ the diffusion goes from where the partial pressure is higher to where it is lower, i.e. from the alveolar capillary, where the PCO₂ is 45 mmHg, to the pulmonary alveolus, where the PCO₂ is 40 mmHg.

Learn more:

Gas exchange brainly.com/question/4469204

6 0

3 years ago

CAN SOMEONE PLEASE TELL ME WHAT IS WRONG WITH A SIMPLE BIOLOGY QUESTION I KEEP ASKING, I WANT ONE OF THE MONITORS TO TELL ME IT

weqwewe [10]

Answer:

uuh, well, the guy that answers the questions with the link is a scammer and DO NOT click the link! it'll ask u to download stuff to ur computer/phone that you have no idea what it is-then u'll have to go and manually uninstall the things it made you download, which is such a pain. the guy also goes by many accounts that start with a b and has no profile pic, and if they answer the question, their answer is immediatly deleted but takes like a day for someone else to answer the question b/c it takes forever to process for that person's account/answer to be deleted-id k why- it just does

6 0

3 years ago

Which behavior can reduce pollution that occurs due to the use of coal?

mixas84 [53]

Answer:

A

Explanation:

Coal is majorly used to produces electricity. The coal is ignited and the heat produced used to heat water to steam. The steam is then used to drive turbines with a dynamo effect to produce electricity. Turning off lights when not in use reduces the demand for electricity hence reducing the amount of coal needed to meet this demand.

Other ways to conserve energy is using bulbs with low energy demand - such as LEDs - and improving natural lighting indoors.

3 0

3 years ago

imagine a cell-surface receptor protein is being newly synthesized. How can it get into the membrane that it will ultimately be

motikmotik

Answer:

the steps for a new receptor synthesis:

Explanation:

Do not forget the steps vary from an eukarityc cell to prokarityc one.

IN AN EUKARYOTIC CELL:

1- Transcription: in the nucleus, mRNA is synthesized from the DNA sequence that codifies the protein. Exons are spliced if needed by spliceosomes.

2- From nucleus into cytoplasm: mRNA goes through nuclear membrane into the cytoplasm were ribosomes, substrates for protein synthesis and other organelles are.

3- Ribosomes recognize a signal in mRNA and start reading the genetic code, three consecutive nucleotides at a time and adjust the correspondent tRNAs (tRNAs carry the aminoacids)

4- Peptide bonds are formed between consecutives aminoacids, and a polypeptide is build up according to the mRNA sequence.

5- (The mRNA has a signal that is recognized by the rough endoplasmic reticulum) The peptide goes into this reticulum (RER) and then into Golgi apparatus. (more chemical modifications are made if needed). By this moment the protein has an inserted portion in a lipid membrane.

6- The protein is transported in a vessel that finally fusions with cytoplasmic membrane and the receptor is in destiny. Hydrophobic aminoacid sequences are inserted in membrane.

IN A PROKARYTIC CELL:

1- Transcription (no splicing is needed, there are not exons)

2- There are not nucleus and cytoplasm divided (no transport)

3- Ribosomes recognize a signal in mRNA and start reading the genetic code, three consecutive nucleotides at a time and adjust the correspondent tRNAs (tRNAs carry the aminoacids)

4- Peptide bonds are formed between consecutives aminoacids, and a polypeptide is build up according to the mRNA sequence.

5- The mRNA has a signal that is guides the growing protein to cellular membrane. Hydrophobic aminoacid sequences are inserted in membrane.

8 0

3 years ago