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oksian1 [2.3K]
2 years ago
15

Which of these substances would you

Biology
1 answer:
vaieri [72.5K]2 years ago
6 0

Answer:

d. paraffin

Explanation:

Paraffin has low thermal conductivity, a high heat capacity, and is insoluble in water.

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How does apoptosis prevent babies from being born with webbed fingers and toes
Anit [1.1K]

Answer:

In many organisms, programmed cell death is a normal part of development. In some cases, apoptosis during development occurs in a very predictable way: in the worm C. elegans, 131131131 cells will die by apoptosis as the worm develops from a single cell to an adult (and we know exactly which ones they are)^1

1

start superscript, 1, end superscript!

Apoptosis also plays a key role in human development. For instance, as we saw in the introduction, your hand started out as a paddle-like block of tissue when you were an embryo. The block was “carved” into fingers by apoptosis of the cells in between the developing fingers.

Microscope images from a scientific paper, showing a developing mouse paw. The cells between the developing digits are stained by a marker that indicates apoptotic cells.

Microscope images from a scientific paper, showing a developing mouse paw. The cells between the developing digits are stained by a marker that indicates apoptotic cells.

Image modified from "Duplication of digit 4 is preceded by reduced apoptosis and expanded chondrogenesis in the posterior limb mesenchyme," by Farin et al. ^2

2

squared, CC BY 4.0.

This process occurs in all sorts of vertebrate species that have finger- or toe-like digits, and less apoptosis results in more webbing between the digits. Sometimes, if a small mistake happens during finger or toe development, apoptosis may be incomplete (leading, for instance, to fused toes).

Other examples of apoptosis during normal development include the loss of a tadpole’s tail as it turns into a frog, and the removal of unneeded neurons in as neural circuits in the brain are “wired.”

Apoptosis can eliminate infected or cancerous cells

In some cases, a cell can pose a threat to the rest of the body if it survives. For instance, this may be the case for cells with DNA damage, pre-cancerous cells, and cells infected by viruses. If these cells undergo apoptosis, the threat to the rest of the organism (such as cancer or spread of a viral infection) is removed.

When a cell’s DNA is damaged, it will typically detect the damage and try to repair it. If the damage is beyond repair, the cell will normally send itself into apoptosis, ensuring that it will not pass on its damaged DNA. When cells have DNA damage but fail to undergo apoptosis, they may be on the road to cancer.

Explanation:

6 0
1 year ago
A bacterial culture is being tested for its ability to reduce nitrate. After incubation and growth of the bacteria in nitrate br
skelet666 [1.2K]

Answer:

All this combination of reactions is summarized in that the bacteria reduced nitrate, that is, they added protons to said compound, giving nitrite as a product.

By promoting the appearance of nitrite and that it increases in its concentrations when the zinc dust is thrown away, it becomes reddish since there was a change in pH, that is, the medium was acidified.

Explanation:

Some bacteria take nitrate as a source and end up generating an oxide reduction reaction that gives nitrite as a product, if this reaction advances in a chain, that is, the nitrite is reduced after the nitrate, the product in the future would be ammonia

8 0
3 years ago
Which of the earth systems does NOT transfer energy through convention cells
Ilya [14]
It’s most likely conduction.
3 0
3 years ago
Read 2 more answers
As blood moves away from the heart toward the tissues, the relative size of blood vessels ________, the blood pressure ________,
KonstantinChe [14]
<span>As blood moves away from the heart toward the tissues, the relative size of blood vessels decreases, the blood pressure drops, and the velocity of blood flow slows.

The size of the arteries progressively decreases as they branch out from the major arteries of the body. Once the arteries are the size of the arterioles, the resistance to blood flow increases and velocity of blood flow slows then blood pressure drops.
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5 0
3 years ago
The main purpose of digestion?
insens350 [35]

Answer:

to break down food into nutrients

8 0
2 years ago
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