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3 years ago

What observation led researchers to purpose that chloroplasts evolved from Cyanobacteria

2 answers:

8 0

Considering your talking about the a-d options Here is my answer
<span>A) Both produce proteins.
B) Both contain mitochondria.
C) Both provide structure to cells.
D) Both perform photosynthesis.

Answer is D</span>

devlian [24]3 years ago

8 0

Researchers were led <span>to propose that chloroplasts evolved from cyanobacteria because they observed that both of them perform photosynthesis. </span>

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NEED HELP FAST!! Question 8(Multiple Choice Worth 3 points) (01.04 HC) A group of students performed an experiment to prove the

Lemur [1.5K]

Answer:

22 degrees

Explanation:

7 0

3 years ago

What are the three classes of bryophytes?

Margaret [11]

Answer:

Class I: Hepaticopsida ( Liverworts)

Class II: Anthocerotopsida ( Hornworts)

Class III: Bryopsida ( Mosses)

Explanation:

Bryophytes are small plants that grows in moist and shady places.They don't attain great heights because of absence of roots, vascular tissues, mechanical tissues and cuticle. They are terrestrial but require external water to complete their life cycle. Hence they are called as the" amphibians" of the animal kingdom.

Class I: Hepaticopsida or Hepaticae

Gametophytic plant body is either thalloid or foliose. If foliose the lateral appendages are without midrib.
Rhizoids without septa
Each cell in the thallus contain many chloroplasts
Sex organs are embedded in the dorsal surface
Capsule lacks columella
Sporophyte may be simple having only one capsule or differentiated into root, seta and capsule
It has 4 orders: Calobryales, Jungermanniales, Spherocarpales and Marchantiales

Class 2: Anthocerotae or Anthocerotopsids:

Gametophytic plant body is simple, thalloid;thallus dorsiventra without air chambers shows no internal differentiation of tissues
Scales are absent in the thallus
Each cell of the thallus possess a single large chloroplast with a pyrenoid
Sporophyte is cylindrical only partly dependent on gametophyte for its nourishment. It is differentiated into bulbous foot and cyclindrical capsule. Seta is meristematic.
Endotheciumforms the sterile central column in the capsule. It have ony one order Anthocerotales

Class 3: Musci or Bryopsida

Gametophyte is differentiated into prostrate protonema and an erect gametophores
Gametophore ids foliose, differentiated into axis and lateral appendages like leaves but without midrib.
Rhizoids are multicellular with oblique septa
Elaters are absent in the capsule of sporangium
The sex organs are produced in seperate branches immersed in a group of leaves.
It has only three orders: Bryales, Andriales and Sphagnales

Bryophytes are used as a packaging material for fragile goods, glasswares etc.Mosses are good source of animal food in rocky and snow clad areas. Decoction prepared by boiling Sphagnum in water is used for the treatment of eye disease.

3 0

3 years ago

What are two functions of cilia in protists?

Lina20 [59]

Hello there ^ _ ^

The two functions of cilia in protists are :

1. sweeps food toward the protist's food passageway
2. moves a protist forward by beating back and forth

I hope this help!

5 0

3 years ago

An element with the property of brittleness is ?<br>

jeka57 [31]

Answer:

I think the answer is graphite.or bone

I hope this helps and sorry if it's wrong

4 0

3 years ago

In an experiment, a researcher measures the mass of an object and gets the following results: 6.08 g, 6.07 g, 6.13 g, 6.09 g. Th

yawa3891 [41]

Considering the definition of accuracy adn precision, the results are accurate and precise.

<h3>Definition of accuracy and precision</h3>

Accuracy is the degree of closeness of the value of the measurements with respect to the real value of the magnitude. The closer a measurement is to the true value, the more accurate it is.

On the other hand, precision is defined as the proximity between the measured values in repeated measurements, under specified conditions; that is, there is more precision the closer the values of different measurements ar

In summary, accuracy is how close a measurement is to the true value, while precision is how close the values of several measurements are to a point.

Accuracy and precision are independent of each other. The results in the values of a measurement can be precise and not exact (and vice versa).

In an experiment, a researcher measures the mass of an object and gets the following results: 6.08 g, 6.07 g, 6.13 g, 6.09 g.

So, the measurement is quite precise, since the results of each individual measurement are quite similar.

Also, the actual mass of the object is known to be 6.10 g, so the measurement can be considered accurate.

In summary, the results are accurate and precise.

Learn more about accurate and precise:

brainly.com/question/24842282

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7 0

2 years ago