A person who has very toned muscles likely has.... A.extra nerve cells. B. lots of digestive enzymes. C.tightly packed myofibrils. D.lots of smooth E.R.

We can confirm that a person with very toned muscles likely has tightly packed myofibrils.

These fibers are the protein filaments that cause contractions in the structure of the muscle. Weight training tones muscles by increasing the number of myofibrils in a sarcomere, thus increasing its capacity to produce force.

Therefore, we can confirm that a person with very toned muscles likely has tightly packed myofibrils.

To learn more about muscle fibers visit:

https://brainly.com/question/1426285?referrer=searchResults

Answer: C

Explanation:

Pls help ASAP WILL GIVE BRAINLIEST 100POINTS!

Conclusion
1. How did scientists discover that all living things are made of cells?
2. How did Pasteur’s experiment with the flasks help disprove the idea that living things could just appear or come from nonliving things like water and air?
3. Why are nutrients needed for living things? Describe the difference between living and nonliving things.

During prophase I, all four chromatids of the two homologues become closely associated as a result of pairing, forming a structure known as a(n)

Please Help! This is due in 5 minutes!
Whose work showed that the fossils in caves were, in fact, a result of accumulation over time rather than the result of one cataclysmic event?
A. Gideon Mantell
B. William Buckland
C. Charles Lyell
D. Richard Owen

How does cytokinesis differ in plant and animal cells?

A. In animals the process leads to only three cells. In plants, the process produces four cells.
B. In plants the cells are physically separated, while animal cells are still joined.
C. In plants the result is four cells; in animals the result is two cells.

D. In animals the cell's area physically separated, while plants are divided by a cell plate.

45. What process in the nitrogen cycle on this planet is taking place in the purple
growth cells?

Energy for use in our cells are stored in the form of

1) chemical bond energy
2) physical energy
3) heat energy
4) mechanical energy

How many chloroplasts are present in a typical plant cell?

What type of physical weathering is caused by the expansion of water?

Helium has an atomic number of two because it has two ____________ . A atoms B protons C neutrons D molecules

The sky of early Earth was probably pinkish-orange. As life became established, the sky turned blue. What was responsible for the color change?

1. Predict: What do you think the offspring of a black mouse and a white mouse will look like?

How are spores similar to seeds?​

I NEED HELP!!! 40 POINTS AND BRAINIEST TO THE FIRST CORRECT ANSWER

True or False: A trait is only considered an adaptation if it is beneficial to the organisms current environment

Which of the following is a negative consequence of nuclear power that concerns many environmentalists?

A
electrical shocks

B
carbon emissions

C
nuclear waste

D
smog

Ethnopharmacology is a subdiscipline in the field of ethnomedicine. Identify what someone within the ethnopharmacology field might do during their research.

How does continental drift theory explain extinction of organisms?

5. Warm currents cause what type of climate?
a. Dry
b. Wet
c. Frigid

is the following sentence true or false? Changes in chromatin structure and histone DNA binding are associated with changes in gene activity.

During translation, amino acids are carried to the ribosome by.

Assess It!

A disease has spread

amongst lily pads in a

pond ecosystem.

Which is true about the

impact of this disease?

A Small fish that rely on lily pads for

protection will decrease in population

The large fish population will increase

C. The water temperature will decrease

D. The frog population will increase

A type of speciation that involves the development of several species, each adapted to a specific environment, from a common ancestor is called _________.

True or False: Traits that are beneficial in one environment will always be beneficial in another environment

Which of the followingdoes NOT affect population growth and decline?

a. the immigration of organisms
b. the emigration rate
c. the fraction of males to females
d. the birth rate and death rate

True or False (Please help me asap)

1. CAM plants use organic acids to store their CO2 for use in light reactions

2. Phase 3 of the Calvin cycle involves the reduction of 3-phosphoglycerate to G3P.

3. in C3 plants, rubisco fixes oxygen if no CO2

4. Photosystem II can operate independently of photosystem I in a cyclic .

5. Carotenoids may act as a sort of energy buffer or “sunscreen” for plants.

6. Chlorophyll b has a methyl group at the R-position of the porphyrin ring.

7. Cyclic electron flow is the primary pathway of energy transformation in light reactions.

In which situation has the precautionary principle been least strictly applied?

A chain of health stores is allowed to sell over-the-counter nutritional supplements that

have not been tested by the Food and Drug Administration for adverse effects.

A foreign marketplace relaxes certain restrictions on genetically modified produce after

testing demonstrates that the produce poses no health risks to consumers.

A toy company recalls a particular brand of action figure after several young children nearly

die from choking on loose pieces of plastic.

The U. S. Government requires that cigarette manufacturers include on cigarette packages a

warning from the surgeon general that smoking causes diseases such as lung cancer

Single-celled plantlike protists and photosynthetic bacteria make up communities of.

Monosaccharides disaccharides and polysaccharides are examples of.

crick originally thought that each type of nitrogenous base hydrogen bonded with its self (A-A, T-T, etc.) why was this incorrect? what makes this impossible?