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3 years ago

Light sensitivity in the euglena is provided by the eyespot. true or false??

Biology

2 answers:

madam [21]3 years ago

6 0

That statement is true

pshichka [43]3 years ago

6 0

Answer:

True

Explanation:

The eyespot is an organ that helps in light reception and is usually present in unicellular organisms and some multicellular invertebrates.
The eyespot is also present in Euglena, which is a green unicellular organism and the eyespot helps it to receive and detect light.
The light detection helps the euglena to move as the eyespot is located at the base of the flagellum and this eyespot helps influence the flagellar motion.

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A All living things contain cells.

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How did the cell membrane acts as a soild and a liquid and show flexibility?

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Answer: "The cell membrane is not a solid structure. It is made of millions of smaller molecules that create a flexible and porous container."

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2 years ago

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Which of these gymnosperms are known to be important in maintaining the balance of carbon in an ecosystem?

CaHeK987 [17]

The correct answer is: [D]:

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→ " redwood tree forests " .

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Note: Let us consider the other answer choices.

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Choice: [A]: "garden flowering plants" ; is incorrect — since these are not generally considered to be part of a true or traditional "ecosystem" ; and especially since "garden flowering plants" are, in fact, "flowering plants" — which means that they are "angiosperms" — Not "gymnosperms ".

→ Rule out: " Choice: [A] " .

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Choice: [B]: " ferns and liverworts " ; is incorrect — since both ferns — as well as liverworts — are Not "gymnosperms ".

Liverworts are "bryophytes" {which lack true vascular tissue] ; and ferns are "pterophytes" ["seedless vascular plants"].

→ Rule out: " Choice: [B] " .

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Choice: [C]: " mosses and horsetails "; is incorrect ; since both mosses — as well as horsetails — are Not "gymnosperms ". Mosses are "bryophytes" (see aforementioned) ; and horsetails are "non-seed bearing plants" that spread vegetatively [underground; by asexual reproduction — and Not by seed .].

→ Rule out: " Choice: [C] " .

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Choice: [D]: " redwood tree forests " ;

— is the only answer choice provided that is a "gymnosperm".

Furthermore, the "redwood tree" is a conifer (i.e. "coniferous; or, "cone-bearing" plant} that reproduces through seeds spread by "cone") — and all "conifers" are a type of "gymnosperm."

Furthermore, "redwood trees" grow large and tall, and redwood forest communities within an ecosystem; due to there size and presence, are: "known to be important in maintaining the balance of carbon in an ecosystem."

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→ As such, the correct answer is:

__________________________________________________

→ Answer choice: [D]: " redwood tree forests " .

__________________________________________________

Hope this helps!

Best wishes to you in your academic endeavors

— and within the "Brainly" community!

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Travka [436]

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