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goldfiish [28.3K]
3 years ago
8

Liverworts and mosses were some of the earliest land-based plants. Which statement correctly explains why these species are stil

l restricted to growing in moist environments? A. They can't absorb water through their roots and must do it through their leaves. B. Their gametes must swim in order to interact and for fertilization to occur. C. They don't have cell walls to retain moisture in their cells and dry out otherwise. D. Their seeds must absorb water in order to germinate.
Biology
2 answers:
Dmitriy789 [7]3 years ago
8 0

Answer:

B. Their gametes must swim in order to interact and for fertilization to occur

Explanation:

Setler79 [48]3 years ago
5 0

Answer: B. Their gametes must swim in order to interact and for fertilization to occur.

Explanation:

Liverworts and mosses are the primitive plants used to have evolved from the aquatic life to terrestrial life. These plants are bryophytes and they do not exhibit true roots, stems and leaves. The reproduction in these organism is facilitated by water as the gametes swims in the water. The fusion or fertilization of the gametes takes place in water.

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Phoenix [80]

Answer:

c

Explanation:

c

6 0
3 years ago
We know that animals can be separated into two big groups: vertebrates and invertebrates. An example of each would be a horse an
Alika [10]

The answer is C since heterotroph means they don't have a way of making food

3 0
3 years ago
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Question 1 (3 points)
SVETLANKA909090 [29]

Answer:

1. Electrons

2. thru the circuit from the negative power terminal to the positive power terminal

3. Current

4. Voltage

5. resistance

6. Amps

7. Volts

8. Ohms

9. The voltage is decreased by the electrical resistance.

10. It doesn't work. The electricity can't go backwards thru an LED.

11. The current will decrease.

12. 0.75 amps

13. The current increase

14. an inverse relationship

Explanation:

1. Electrons are what move through a circuit. These electrons are called mobile electrons. Unlike protons and neutrons, they are not confined in the nucleus and are free to move about.

2. Electrons tend to move towards the positive. When an electron moves to a stable atom,the atom would have too much electrons, making it negatively charged. This then would cause a chain reaction of passing on electrons to keep stable.

10.

3 to 8:

Collectively, the flow of electric current is dependent on four things: Voltage, current, resistance, and power.

Voltage is the like the driving force of current. It is the measure of the potential energy or electric potential difference between two points. The unit of voltage is volts, named after Alessandro Volta. You can think of volts as electrical pressure. The higher the voltage, the higher the pressure on the flow of charge.

Current is the "flow" of electrons. It could have another meaning though, in electronics, we refer to current as the volume of the flow of electrons. Current is measured in AMPERES or amps named after Andre M. Ampere. Current is a measure of rate, or the rate of the amount of electrons that flow through a certain point in a circuit, at a given time.

Resistance on the other hand is the opposing force. As electrons move along a circuit, there is bound to be friction. This friction opposes the movement of the electrons, which we call resistance. Resistance uses the unit ohms or the symbol Ω.

These three are all related. The flow of current is affected by how much voltage there is available or pressure available for the movement of the electrons, and at the same time, it is also affected to how much resistance there is in the circuit. And that is where Ohm's Law comes in.

9 and 11-14:

Ohm's Law describes the relationship between current, voltage and resistance. It can be summarized into this formula:

V = IR \rightarrow\; I=\dfrac{V}{R}\rightarrow\;R=\dfrac{V}{I}

Where:

V = voltage

I = Current

R = Resistance

9. When electricity is met with an electrical component, the resistance through that part of the circuit increases. However, the resistance does not change the potential difference between the two points, but rather, it changes the amount of current that flows through. This means that it does not affect the voltage.

11. But on the other hand, for this scenario, the resistance was increased from 10 Ohms to 15 Ohms. Current and resistance have an indirect relationship. This means that as one goes up, the other goes down. As the resistance increases, the less current is able to flow through and thus the current will decrease.

12. Using Ohm's Law we can solve this:

I = \dfrac{V}{R}

The following is our given:

V = 9 V

R = 12 Ω

We plug that in our formula:

I = \dfrac{V}{R}\\\\I = \dfrac{9}{12} = \dfrac{3}{4} = 0.75A

13. As mentioned earlier, current and resistance have an indirect relationship. So when you have this scenario where the resistance  chages from 20 Ω to 12Ω, you see that there is a decrease in resistance. This means that more current can flow through this circuit. So this means that the current increases.

14. was already explained above.

Hope this helps even just a little bit! Good Luck!

4 0
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3 years ago
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The principle characteristic that differentiates temperate and tropical rain forests is ________.
Vesnalui [34]

Answer:

The difference is in the location. If the rain forest is close to the equator, it is considered tropical. If the rain forest is farther away from the equator (between the Arctic Circle and the Tropic of Cancer or the Antarctic Circle and the Tropic of Capricorn) then the forest is considered to temperate.

Explanation:

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