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3 years ago

Is pyrite a molecular substance or a network substance?

Biology

2 answers:

Marianna [84]3 years ago

6 0

Its a molecular substance

Lynna [10]3 years ago

4 0

Answer:

pyrite is a network substance.

It is a chemical compound in which the atoms are bonded by bonds in a continuous network extending throughout the material. In a network solid there are no individual molecules. Pyrite is a sulphide group mineral whose chemical formula is FeS2

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The common atrium is subdivided into a left and right atrium by an interatrial septum, which consists of two parts: the septum a

Gelneren [198K]

The common atrium is subdivided into a left and right atrium by an interatrial septum, which consists of two parts: the septum primum and the septum secundum that partially overlap.

What is septum primum and septum secundum?

The septum primum, which divides the right from the left, is a structure inside the primitive atrium.
In the direction of the endocardial cushions, this septum descends.
The foramen primum, a hole in this septum, keeps the blood flowing through the heart.
The foramen secundum develops as the foramen primum shrinks in size.

What is the purpose of septum secundum?

A muscular flap called the septum secundum plays a significant role in heart growth.
It has a semi-lunar form and develops from the atrium's upper wall to the right of the septum primum and ostium secundum.
It is crucial for the foramen ovale to close after birth.

Learn more about septum secundum

brainly.com/question/13257021

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The correct question is -

The common atrium is subdivided into a left and right atrium by an interatrial septum, which consists of two parts: the septum ______ and the septum ______ that partially overlap.

8 0

2 years ago

The fact that choanoflagellates and collar cells of sponges resemble each other supports the inference that ________. Group of a

antoniya [11.8K]

Answer:

choanoflagellates and sponges are sister groups

Explanation:

The choanoflagellates are small unicellular organisms belonging to the Protista kingdom. These microorganisms are collared flagellates morphologically similar to the choanocyte cells of animal sponges, which have a central flagellum surrounded by a collar of microvilli. In consequence, it has been suggested that choanoflagellates may represent the closest living relatives of primitive metazoans (i.e., they are sister groups to sponges). This hypothesis has recently been supported by both molecular phylogenetic and comparative genomic analyses.

6 0

3 years ago

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 " .

___________________________________________________

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] " .

__________________________________________________

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."

__________________________________________________

→ 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!

__________________________________________________

5 0

3 years ago

Read 2 more answers

Please answer this

miss Akunina [59]

Answer:

I think the answer would be D,I'm not really sure though,hope I'm right,sorry if I,m not :)

Explanation:

6 0

3 years ago

Landslides occur when earth materials that are no longer held by friction move down a slope with the help of gravity. I think th

xxTIMURxx [149]

Yes, the given statement is true.

A landslide is illustrated as the movement of debris, the mass of rock, or earth down a slope. The landslides are a kind of mass wasting that signifies any down-slope movement of rock and soil under the direct effect of gravity.

The slope movement takes place when the forces functioning on down-slope primarily because of gravity exceeds the strength of the Earth substances, which compose the slope. The causes comprise elements, which elevates the influences of down-slope forces and factors, which contribute to reduced or low strength.

8 0

3 years ago