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galina1969 [7]
3 years ago
12

Sexual reproduction by protozoa is most likely conducted by what

Biology
1 answer:
notka56 [123]3 years ago
6 0

Its conducted by the conjugation of two mature cells

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A certain plant species has seeds that remain dormant until heat stimulates them to germinate.
Harlamova29_29 [7]

Answer:

Explanations: primary succession will take place because these plants will dominate after a wild fire has occured in the area since their growth is stimulated by heat hence the heat will result to the widespread of this type of plant

These plants are indeed dependant on succession events because they are only stimulated to grow through heat events

6 0
3 years ago
Corn plants cannot be separated into discrete types or classes by their height.
GarryVolchara [31]

Answer:

B

Explanation:

as it clearly shows on the graph

8 0
2 years ago
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If a label indicated the presence of a radioactive isotope, you would know what
Citrus2011 [14]

Answer:

Radioisotopes are radioactive isotopes of an element

Explanation: Radioactive isotopes are detected by: photographic film.

a cloud or bubble chamber.

a liquid scintillation detector.

a Geiger-Muller counter.

5 0
2 years ago
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Which of the following statements is FALSE?
krek1111 [17]

Answer:

Answer is A. Cdk7 of the CAK (TFIIH component) phosphorylates Cyclin 8 of the Mediator to down regulate promoter activity.

Refer below.

Explanation:

Cdk7 of the CAK (TFIIH component) phosphorylates Cyclin 8 of the Mediator to down regulate promoter activity is a FALSE STATEMENT.

7 0
3 years ago
Caffeine aids in the movement of calcium ions across cell membranes by both making it easier for the Ca2+ channels to open and b
Llana [10]

Caffeine cause dose dependent prominent increase in force of contraction and period of contraction of muscle

<u>Explanation:</u>

Caffeine is widely used in foods and drinks. Its long time use can effect central nervous system include lethargy memory, sleep disorder and anxiety.

Increase in concentration of calcium ion will result increase number of power stroke and force for contraction.  However latent period and relaxation period are unaffected by caffeine. Increase in concentration of calcium ion will result increase number of power stroke and force for contraction.

Because of calcium ion release in skeletal muscle, caffeine causes peripheral manifestation such as hyper-reflexia, muscle twitching etc.

High amount of caffeine leads to increase in release of Ca2+ from sarcoplasmic reticulum. It increases tension development in single tetanic contraction and re-initiate maximum tension in fatigue single myofibre by restoring Ca2+ release from sarcoplasmic reticulum to non-fatigued levels.

8 0
3 years ago
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