15) Food habits in a given culture are largely based on which of the following? (Select all that apply.)

Change in the _______ of breathing is accomplished by altering the amount of time spent in both inspiration and expiration, wher

GaryK [48]

Answer:

Rate and depth.

Explanation:

Breathing may be defined as the process of intake of oxygen and exhalation of carbon dioxide. The inhalation and exhalation depends on the partial pressure of gases, atmosphere and pressure of alveoli.

The breathing rate can be changed easily by increasing or decreasing the time of inspiration and the expiration. This changes the volume of oxygen and carbon dioxide in the body. The depth of breathing is controlled by the respiratory center present in the brain. The stimulation of the accessory muscles may increase the thoracic volume change and alters the breathing depth.

Thus, the answer is rate and depth.

5 0

3 years ago

How do eukaryotic cells differ from each other?

kiruha [24]

Unlike Prokaryotic cells, eukaryotic cells can actually have different roles instead of the same cell over and over. This, obviously, leads to more complex creatures. Basically, a theory (now proven correct) called The Big Gulp explains how we took in small prokaryotic organisms to do the roles for us. For example, mitochondria makes proteins so we do not have to waste our own organisms protein.

8 0

3 years ago

A neuroscientist cuts a brain in half, along the division between the hemispheres. this cut is referred to as a _____________ cu

saw5 [17]

Answer;

-Midsagittal cut

A neuroscientist cuts a brain in half, along the division between the hemispheres. this cut is referred to as a midsagittal cut.

Explanation;

The midsagittal plane divides the human body into equal left and right halves. It is used to describe the sagittal plane as it bisects the body vertically through the midline marked by the navel, dividing the body exactly in left and right side.

-If divided along this plane, the deepest structures of the human body will be visible. Starting with the most superior portion of the body, visible would be the brain. Cutting along the midsagittal plane, the structures of the brain would be exposed including the pineal body, the corpus callosum, thalamus, midbarin, pons, medulla oblangata, hypothalamus, and the arbor vitae of the cerebellum.

4 0

3 years ago

How are forest ecosystems named?

White raven [17]

Answer:

by location and by dominant tree species

Choice A is correct

Explanation:

Forest ecosystems are named by location and by dominant tree species.

Forest ecosystems are defined by a common set of characteristics that make the forest ecology of a given area unique. The classifications are usually named for the dominant trees and plant species.

8 0

3 years ago

What effect, if any, did a change to the DNA code have

MariettaO [177]

Answer: A change to the DNA sequence may or may not change the functionality of the protein, make an inactive protein, or prevent production of the protein.

Explanation: NO SEQUENCE SHOWN, but generally

A gene codes for a protein. A change in one nucleotide (single nucleotide polymorphism - SNP) can have several different consequences. The deletion or insertion of a nucleotide also has consequences

The protein-making part of the gene is organised into codons - groups of three nucleotides who sequences make up the genetic code. Changes may have any of these consequences for the protein:

1. No consequence: there are redundancies in the code and an SNP may not change the meaning of the codon, especially if it is the third nucleotide

Example: CGT --> CGA these both code for serine, so no change

2. No consequence: an SNP may change the amino acid, but if this is not at a critical part of the protein and/or the amino acids have similar properties it will not affect the end product

Example: ACT --> CCT = isoleucine --> leucine

3. An SNP affects protein folding or the active site. This can alter or prevent protein function

Example: GAG --> GTG = glutamic acid --> valine

leads to sickle cell anaemia if both alleles affected

4. An SNP may prevent completion of the protein. STOP codons tell the reading mechanism the process is complete. If this happens during the process, the incomplete fragment is removed. If the revers occurs, reading will continue until another STOP codon adding additional structure thar will interfere withprotein function.

Example: TAT --> TAG = thyrosine --> STOP codon

5. Insertions and deletions can also disrupt protein formation, by changing the reading frame. The transcription process relies on having a start point, so that codons are read from that point (the reading frame). Adding or removing alters the reading frame so that codons are read incorrectly

Example (start)TTCATCGAGTATCGTACA...codes for phe-ile-glu-tyr-arg-thr

suppose the second C is deleted

the reading frame becomes (start)TTCATGAGTATCGTACA.

which reads as phe-met-ser-ile-val- , a very different sequence.

3 0

3 years ago