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I am Lyosha [343]
3 years ago
9

Someone please help I took the picture this is my last question on my homework

Biology
1 answer:
Yanka [14]3 years ago
6 0

Answer:

According to the image that represents a cell in the human body, the true statement is that structure 4 is the cell membrane that provides exchange of O₂ & CO₂.

Explanation:

In cells, the cell membrane acts as a semi-permeable barrier to the passage of substances, including nutrients and oxygen (O₂).

One of the functions of the cell membrane is to allow the exchange of O₂ —necessary for the cell— and carbon dioxide (CO₂), a product of cell metabolism that must be removed.

In the image, the structure identified with the number 4 corresponds to a cell membrane of human cells that provides this gas exchange.

The other options are not correct because:

  • <em>Structure 1 is a ribosome, not a </em><u><em>chloroplast</em></u><em>. </em>
  • <em>Structure 2 is the nucleus, not a </em><u><em>vacuole containing DNA</em></u><em>. </em>
  • <em>Structure 3 is a </em><u><em>mitochondria</em></u><em>, but protein synthesis does not occur there.</em>
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4 0
3 years ago
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What is the manipulated variable in this experiment?
jasenka [17]

The correct answer is C. The temperature of the water

Explanation:

In an experiment such as the one described about the speed of snails in water, the manipulated variable is the factor or element that is manipulated on purpose. This means the researcher or researchers slightly change this element to compare how this affects another variable. In this context, the manipulated variable is the temperature of the water because researchers used three different temperatures (cool, room-temperature, and warm), and therefore they manipulated or changed this factor. Moreover, it is expected temperature affects the distance nails move, which is the main variable.

7 0
3 years ago
Drag each tile to the correct location on the table.
RideAnS [48]

Answer:

Kidneys : helps in forming urine

Ureter : They are connected to kidney and by peristaltic action transports urine from kidneys to bladder .

Urinary bladder : It is an hollow sac that holds the urine .

Urethra : transports urine from the bladder to outside of the body .

Explanation:

The human excretory system consists of   : Kidney ,ureter ,urinary bladder and urethra .The figure is shown below .

Now , as far as functions are concerned we have :

Kidneys : They have excretory units called nephrons that  further  consist of :

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In nephrons urine is formed and via ureter it is transported to a hollow sac like structure called  urinary bladder .

This bladder has muscles that cant remain contracted up to longer period )and then voluntary and involuntary it is excreted through urethra .

The process of passing urine is called Micturition .

6 0
3 years ago
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What structure is required for an eukaryotic organism to be classified as an autotroph?
lara [203]

Answer:

Chloroplast

Explanation:

This organelle in cells indicates that an organism can harness energy from the sun and other abiotic factors like carbon dioxide to make their own ‘food’. Chroloplasts have chlorophyl piments that contains photosystems centers that harness energy from the sun for photosynthesis. This light energy from the sun is captured and transferred in chemical bonds of manufactured carbohydrates which are stored in the plants. These plants transfer this energy in an ecosystem when they are consumed by higher organisms in the food chain.

4 0
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Sophie [7]

Answer:

transpiration

Explanation:

i am sorry if it is right

4 0
3 years ago
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