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Alexxandr [17]
3 years ago
10

Which of these organisms does not need a digestive system because it produces its own food? A)cactus B)bee C)tiger D)dinosaur

Biology
2 answers:
umka21 [38]3 years ago
7 0

Answer:

Cactus is the answer

schepotkina [342]3 years ago
4 0

Answer:

Explanation:

                                                                                                                                                       

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Which of the following events would change Earth's surface the fastest?
avanturin [10]

Answer:

B.) an earthquake

Explanation:

earthquake, volcanoes, tsunamis and landslides are naturally occurring events that can rapidly change earth's surface

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3 years ago
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How does diploidy help to preserve genetic variation? see concept 23.4 (page 498)?
mario62 [17]
Monoploid organisms reproduce asexually since they need to transmit all of their genetic material to their offspring. Diploid organisms, have 2 copies of their genetic material that differ slightly in their genes. Since the progeny gets half of the DNA from each parent, we have that new combinations can emerge; for example, if the mother is AA for some allele and the father aa, their offspring will be Aa, a new genotype. This might have different implications (for example, the recessive gene for thalassemia also provides resistance to malaria). Finally, during meiosis, there is also an event called crossover that increases the genetic variation of the offspring.
3 0
3 years ago
When acetylcholine binds to receptors at the motor end plate, the end plate membrane becames:__________a. repolarized. b. more p
sladkih [1.3K]

Answer:

d. more permeable to sodium ions.

Explanation:

The binding of Acetylcholine  with the receptors at  motor end plate facilitate   membrane permeability to sodium ions therefore  opening of voltage gated channels for sodium ions.

Sodium ions diffused into the synapse of post synaptic neuron at the neuromuscular junction.

If  the  stimulus is up to threshold levels; more chemical(neurotransmitter) gated sodium channels opens, and sodium ions move into the  synapse to depolarize the membrane with  reversal of charges to generate action potential.

The continuous  binding of Acetycholine , leads to permanent opening of sodium ions,and over excitation from depolarization.  Acetycholinesterase enzymes breakdown Acetycholine to choline  and Acetyl Co -A. These are recycle back to Acetycholiine

7 0
3 years ago
Which term describes a detrivore
xenn [34]
A detritivore, also known as a detrivore, are heterotrophs or decomposers that act as nature's recyclers and feed on dead organic material/remains
4 0
3 years ago
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Which evidence has led scientists to conclude that there are different layers within Earth's interior?
Elenna [48]

Answer:

Explanation:

1) análisis de datos de ondas sísmicas

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