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3 years ago

The producers at the beginning of Earth's food chain are _____

Biology

2 answers:

Marianna [84]3 years ago

7 0

Answer:

Producers are organisms who make (or produce) their own food. Plants are producers. Plants are autotrophic, meaning that they self-feed through the process of photosynthesis. Without plants in the food chain creating energy from a non-living source (the sun) the rest of the food chain would not exist

Explanation:

likoan [24]3 years ago

5 0

It was plants. Plants used photosynthesis, basically the sun's energy. And other animals ate the plants, and other animals ate the animals that ate the plant.

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Is Algae considered a heterotroph or an autotroph?

Dmitry [639]

Answer:

it's considered autotrophic ;)

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3 years ago

2.86 A ball is dropped from rest from the top of a cliff that is 24 m high. From ground level, a second ball is thrown straight

Rashid [163]

Answer:

Distance Below the top = 6,02 m

Explanation:

To get the Final velocity of the first ball (that will be the intial velocity of the second) you need to solve the kinematic equation for Velocity:

(1) $V_{1f} =V_{1O} - gt$

As the ball is dropped from rest $V_{1O} = 0$ , so:

(2) $V_{1f} = - gt$

Note that the velocity is going to be negative as the ball is going down. To get the time it would take the ball to reach de base you can use the kinematic equation for position:

(3) $h_{1} = h_{1O} + V_{1O} *t - \frac{1}{2} gt^{2}$

We need the answer when h=0, and from the initial conditions $V_{1O} = 0, h_{1O} = 24m$ , you get:

(4) $24m = \frac{1}{2} gt_{1f}^{2}$

Solving for t, with $9,8\frac{m}{s^{2}}$ and :

(5) $t_{1f} = \sqrt{\frac{24m*2}{g} } = 2,21 s$

Replacing this time in (2), the final velocity is:

(6) $V_{1f} = -21,66 \frac{m}{s}$

So the initial velocity of ball 2 is equial to this but oppossite in direction so: $V_{2O}= -V_{1f} = 21,66 \frac{m}{s}$

The general position equation for ball 2 is (considering $h_{2O} = 0$ :

(7) $h_{2} = V_{2O} *t - \frac{1}{2} gt^{2}$

They cross paths when $h_{1}=h_{2}$ so:

(8) $h_{1O} - \frac{1}{2} gt^{2} = V_{2O} *t - \frac{1}{2} gt^{2}$

Rearranging:

(9) $t_{cross} =\frac{h_{1O}}{V_{2O} }$

Replacing values:

$t_{cross} = 1,108 s$

To get the absolute position replace $t_{cross}$ on equation (3) or (7):

$h_{cross} = 17,98 m$

To get it below the top of te cliff:

$h_{cross, from above} = 24 m - 17,98 m$

$h_{cross, from above} = 6,02 m$

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4 years ago

The most likely explanation for showing fewer organisms at each feeding level going up the pyrmaid is that

Zielflug [23.3K]

The most likely explanation for showing fewer organisms at each feeding level going up the pyramid is that Some energy is lost to the environment as Heat

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4 years ago

Which of the following best explains why ecosystems need a continual influx of new energy?

trasher [3.6K]

C. <span>Energy flows through an ecosystem and cannot be recycled. </span>

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4 years ago

Read 2 more answers

If a horse and zebra breed to produce a sterile horse.____

Vaselesa [24]

Answer:

Biogeographic isolation is the separation of organisms of a species through geographical or biological forces.