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3 years ago

What was Darwin's role while he was aboard the Beagle on the voyage to South America?

2 answers:

8 0

Charles Darwin was B. A Naturalist on the Beagle voyage to South America. A naturalist observes and collects plant, animal, rock, and fossil specimens.

Naddika [18.5K]3 years ago

4 0

the answer to this question is letter B

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The number of cells in an average-sized adult human is on the order of 10^14 cells. Use this information, and the estimate that

KengaRu [80]

IF:
Number of cells: $C = 10^{14}$
DNA lenght: $D = 2m = 12.42 * 10^{-4} mi$
Distance from Earth to Sun: $ES=93000000 mi = 9.3* 10^{7}mi$

Then:
a) Over how many miles would the total DNA from the average human stretch?
The answer is product of multiplication of the number of cells (C) and the DNA length (D):
Total DNA: $T = C*D$
⇒ $T = 10^{14}*12.42* 10^{-4} mi$
⇒ $T = 12.42* 10^{14-4} mi$
⇒ $T = 12.42* 10^{10} mi$
The total DNA from the average human will stretch $12.42* 10^{10} mi$

b) How many times would the total DNA from the average human stretch from Earth to the Sun and back?
The answer is concluded from the ratio of the total DNA length (T) and the twice (because of stretch to the Sun and back, thus, two directions) of distance from Earth to the Sun (ES) and :
Ratio: $R= \frac{T}{2*ES}$
⇒ $R = \frac{12.42* 10^{10}mi }{2*(9.3* 10^{7}mi)}$
⇒ $R = \frac{12.42* 10^{10}}{18.6*10^{7}}$
⇒ $R = 0.6677* 10^{10-7}$
 ⇒ $R = 0.6677* 10^{3}$
 ⇒ [tex]R = 667.7
Thus, 667,7 times will the total DNA from the average human stretch from Earth to the Sun and back.

6 0

3 years ago

Cross bridges are created when myosin heads bind to _____

lord [1]

Cross bridges are created when myosin heads bind to ATP. This phenomenon is basically muscle contraction at work. In order for myosin heads to be bound with ATP at the actin active site, it must be excited with Calcium.

Once myosin heads bind with ATP, it begins to slide and perform muscle contractions in the body, allowing a person to move.

3 0

3 years ago

What are facts about embryonic stem cell research?

Igoryamba

Derived from the inner cells of a human blastocysts , a very early human embryo.
At the blastocyst stage, five to 10 days after fertilization,
the embryo is a cluster of 100-200 cells

7 0

3 years ago

Read 2 more answers

Which of the following is an abiotic factor in the ecosystem?

Naily [24]

---- *Well, since there is really no specific ecosystem that was asked about in the question, I will just list some common and basic abiotic factors found throughout most ecosystems (maybe you can match this with the ecosystem you are talking about).

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Abiotic factors: nonliving parts of an ecosystem

Some abiotic factors include: ROCKS, SOIL, AIR, SUN, WATER, ETC.

7 0

2 years ago

During a knee flexion exercise, when you begin to fatigue what movement will you attempt to perform? Why?

nignag [31]

Knee flexion exercise is an exercise that involves bending the leg at the knee joint, thereby reducing the gap between the lower leg and upper leg.

The benefit of this exercise includes:

Helps to strengthens the muscles in the back of the thigh.

Helps to strengthens the muscles at the hamstrings.

The voluntary action that i may perform after experiencing fatigue from the exercise is to Stand Upright.

The action will helps my lower leg and upper leg to regain normal posture, thereby reducing the muscle tension around my knee.

Learn more about knee flexion exercise here

brainly.com/question/22466488

7 0

2 years ago