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inessss [21]
2 years ago
11

You suspect that changes in the hormone levels of a bird are causing it to sing more frequently. this is an example of a(n)?

Biology
1 answer:
Svetllana [295]2 years ago
7 0

You suspect that changes in the hormone levels of a bird are causing it to sing more frequently. this is an example of a(n):

<u>proximate hypothesis</u>

<u></u>

What is a proximate hypothesis?

An event that is nearest to, or directly accountable for, creating some observed effect is referred to as a proximate cause. This contrasts with a higher-level ultimate cause (also known as a distal cause), which is typically regarded as the "real" cause of an event.

 Ex: What caused the ship to sink? A breach beneath the waterline allowed water to enter the hull, making the ship denser than the water that was supporting it, which prevented it from remaining afloat. The ship's collision with a rock, which tore a hole in its hull, was the ultimate reason.

to know more about proximate hypothesis

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An action potential involves potassium ions moving ________ the cell and sodium ions moving ________ the cell.
Alecsey [184]

An action potential involves potassium ions moving <u>outside </u>the cell and sodium ions moving <u>inside </u>the cell.

<h3>how does it action potential work?</h3>

Neurons have a negative concentration gradient most of the time, meaning there are more positively charged ions outside than inside the cell. This regular state of a negative concentration gradient is called resting membrane potential. During the resting membrane potential there are:

  • more sodium ions (Na^+ ) outside than inside the neuron
  • more potassium ions (K^+ ) inside than outside the neuron

The concentration of ions isn’t static though! Ions are flowing in and out of the neuron constantly as the ions try to equalize their concentrations. The cell however maintains a fairly consistent negative concentration gradient (between -40 to -90 millivolts). How?

  • The neuron cell membrane is super permeable to potassium ions, and so lots of potassium leaks out of the neuron through potassium leakage channels (holes in the cell wall).
  • The neuron cell membrane is partially permeable to sodium ions, so sodium atoms slowly leak into the neuron through sodium leakage channels.
  • The cell wants to maintain a negative resting membrane potential, so it has a pump that pumps potassium back into the cell and pumps sodium out of the cell at the same time.

Learn more about action potential

brainly.com/question/6705448

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5 0
1 year ago
What are the parts that make up a nucleotide?
vesna_86 [32]

Nitrogen bases

sugar

phosphate group

6 0
3 years ago
!!!!!!!!!!!!H-E-L-P!!!!!!!!!! How do index fossils help scientists establish how old rocks and other fossils are? In your answer
Artist 52 [7]

Answer:

Certain fossils, called index fossils, help geologists match rock layers. To be useful as an index fossil, a fossil must be widely distributed and represent a type of organism that existed for a brief time period. Index fossils are useful because they tell the relative ages of the rock layers in which they occur.

6 0
2 years ago
What is similar about a dominant trait and a recessive trait
lutik1710 [3]

Answer:

The trait that first appears or is visibly expressed in the organism is called the dominant trait. The trait that is present at the gene level but is masked and does not show itself in the organism is called the recessive trait.

Explanation:

4 0
3 years ago
Read 2 more answers
Making and defending a claim on genetic mutations
nata0808 [166]

THE MUSCULAR

SYSTEM

Movements YOU CAN

VOLUNTARILY and

INVOLUNTARily clo

are controued by

the muscular System

more

SMOOTU Muscles

heb operate organi

OLUNTARY

e footh you

den

CARDIAC muscles

keep the heart Png

involuntary

3

all in

your

WORK

TUN

cons

Internal

1

Skeletal muscles

+Move your bones

*Voluntary

bladder

2

Toke

turns

Contracting

& Piping

4

4

Match the word phrase with the correct place on the chart."

1

2

3

4

Constantly at Work

Stomach

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Answer:



Explanation:



Time has not brought any general agreement, and a universal ... Other authors even claim that germline editing should be considered a moral imperative ... genetic manipulation of the germline on the basis of human dignity are not solid. ... of cloning—as it generates mutations—but even to use gene editing

8 0
3 years ago
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