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Kobotan [32]
3 years ago
11

The images show two different types of Galapagos tortoises that scientists believe descended from the same species. The first ty

pe (left) lives on islands that have high vegetation and few grasses. The second type (right) lives on an island that has large amounts of grasses and low-lying shrubs. What explains the differences in the second turtle's characteristics?
A. The environment triggered a gene mutation in neck length to help the second turtle survive.
B.Mutations are random, so the high number of individuals with longer necks is simply by chance.
C. turtles with genes for long necks had a better chance of surviving to reach reproductive age.
D.Turtles with short necks completely lacked adaptations for survival, so they died off.
Physics
2 answers:
Leya [2.2K]3 years ago
4 0

Answer:

The answer is C

Explanation:

Turtles with genes for long necks had a better chance of surviving to reach reproductive age.

vichka [17]3 years ago
3 0

Answer:

C. turtles with genes for long necks had a better chance of surviving to reach reproductive age.

Explanation:

The turtles that had long necks were more fit to the environmnet in which they were lovated and were able to grow larger and have more reproductive time because of their ability to feed on grass and small shrubs, this helped them always haev food available, and made them the dominant gene eventually.

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A baseball hits a car, breaking its window and triggering its alarm which sounds at a frequency of 1210 Hz. What frequency (in H
IRINA_888 [86]

Answer:

The frequency of sound heard by the boy is 1181 Hz.

Explanation:

Given that,

Frequency of sound from alarm  f_{0} = 1210\ Hz

Speed = -8.25 m/s

Negative sign show the boy riding away from the car

Speed of sound = 343

We need to calculate the heard frequency

Using formula of frequency

f = f_{0}(\dfrac{v+v_{0}}{v-v_{s}})

Where, f_{0} = frequency of source

v_{0} = speed of observer

v_{s} = speed of source

v = speed of sound

Put the value into the formula

f=1210\times\dfrac{343+(-8.25)}{343-0}

here, source is at rest

f=1180.8\ Hz

f=1181\ Hz

Hence, The frequency of sound heard by the boy is 1181 Hz.

8 0
3 years ago
A student says that since the atomic theory is just a theory, it should not be considered useful. Which statement best argues ag
yarga [219]
Theories are usually backed up with a lot of evidence. If the evidence is well studied then it is useful information.
4 0
3 years ago
A mechanic uses a jack to lift up a car. He exerts a force of 11,000 N at a distance of 3m from the axis of rotation. How much t
pshichka [43]

Answer:

<h2>The amount of torque put on the car is 33,000Nm</h2>

Explanation:

Formula for calculating torque is expressed as T = rFsin\theta\\ where;

r is the radius of the  of the arm of the jack = 3m

F is the force exerted = 11000

\theta\\ is the angle of rotation = 90°

On substituting;

T = 3*11000sin90^{o} \\T = 3*11000 (sin90^{o} =1)\\T = 33000Nm

6 0
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