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3 years ago

Which reproductive method is the only one available to mosses and ferns?

Biology

1 answer:

nlexa [21]3 years ago

6 0

Answer:

alternation of generation with both sexual and asexual reproduction

Explanation:

Both moss and fern belong to kingdom plantae. The gametophyte is dominant in moss and sporophyte in fern. The gametophyte produces games that fertilize forming an embryo. The embryo develops into a sporophyte that produces spores which then germinate forming a plant.

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You are building a birdhouse when you cut your finger. Predict which body systems would be immediately involved with your reacti

viktelen [127]

I think it is the immune system I'm not sure

6 0

2 years ago

What is affected by the electrical signal sent by the fourth structure of the reflex arc?(This will be the fifth structure in th

Stells [14]

Answer:

The effector organ is affected by the fourth structure of the reflex arc.

Explanation:

When talking about the reflex arc, we refer to the sequence of events that occur for the body to react to an external stimulus.

In general terms, the peripheric nervous system receives information from a stimulus coming from the external environment. This information is sent to the central nervous system, where it is processed. From the CNS, another signal is sent as a response to the stimulus. This mechanism is known as the reflex arc.

Five elements compose the reflex arc, which are receptors, three types of neurons, and effectors.

There are three types of neurons involved in the mechanism:

• Afferent or sensorial neurons

• Interneurons

• Efferent or motor neurons

Action:

Ascending branch

The stimulus reaches the body and is received by the specialized sensory receptors. Information is received by these receptors and converted from stimuli energy (temperature, pressure, light, etc.) to action potential energy. Afferent neurons, placed in the dermis and epidermis, receive information from receptors, react and send the information to the central nervous system as nerve impulses.

Descending branch

Once the information reaches the central nervous system, it is processed by the interneurons that analyze it before sending a response. Interneurons manage many sensorial signals, evaluate and compare them, and send a motor response.

Efferent neurons receive information from the interneurons and are stimulated to carry these new signals from the central nervous system to the cells of the effector organs. The effector organ can be a muscle or a gland.

Finally, the target tissue responds to the stimulus as a contraction, if it is a muscle, or as hormones release if it is a gland.

8 0

2 years ago

On the Galapagos islands Darwin observed tortoises with a dome and saddle shaped shells. How did Darwin observation of these tor

Nataly [62]

It is true that on the Galapagos islands Darwin observed tortoises with a dome and saddle shaped shells, you can see both in attached image.

Darwin observed that Galapagos Tortoises had the shells with different shapes depending on the Island they live, For example: The tortoises with saddle shaped shells were able to reach up to eat leaves of plants while the tortoises with dome shaped shells would not reach up and they would eat food from on ground sources. This made him think that the differences in tortoise shell is also a strong evidence that indicates that how tortoises have adapted themselves to better get their food as per the available resources and how they have evolved from same ancestral specie into two different species. This point also helped him in proposing the theory of evolution by natural selection.

Hope it helps!

5 0

3 years ago

What does this mean: +.90 in psychology

MariettaO [177]

Answer:

Humanitarianism, compassion, and idealism

Explanation:

90 is a number of Humanitarianism, compassion, and idealism the numerology number 90 is a number of humanitarianism, compassion, and idealism. it is a number of philanthropy and tolerance.

8 0

3 years ago

The Sun's ability to send energy to Earth through millions of miles of outer space demonstrates which process?

pentagon [3]

Answer:

Radiation! I hope this helps

Explanation:

7 0

3 years ago

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