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Genrish500 [490]
3 years ago
15

If an organism didn't have DNA, it would be missing which sign of life?

Biology
1 answer:
JulijaS [17]3 years ago
8 0

Answer:

C

Explanation:

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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
2 years ago
Which organism is a herbivore? A. spider B. bacterium C. grass D. grasshopper
kumpel [21]
The answer is D. grasshopper
5 0
3 years ago
Read 2 more answers
Help please really urgent!!!
horsena [70]

Answer:

I gotcha.

1. A genetically modified organism (GMO) is any organism whose genetic material has been altered using genetic engineering techniques.

2. GMO crops contribute to food security, sustainability, the environment and climate change.

3. As GMOs stand today, there are no health benefits to eating them over non-GMO foods. However, this may change in the future as technology develops and becomes more sophisticated.

4. Increased use of toxic herbicides and pesticides, Pleiotropy – unforeseen consequences and Contamination

5. (You answer)

I hope this helped! :)

5 0
3 years ago
What is the force that keeps the moon in orbit around the Earth? A. momentum B. gravity C. inertia
8_murik_8 [283]
The answer is the letter B
6 0
3 years ago
Explain the advantages to a plant of having its cell membranes surrounded by cell walls
QveST [7]
Plant cell walls are rigid membranes on the outermost part of the cell. The cell wall provides a structured shape for the cell, helping the cell retain its form and shape. The cell wall also controls the rate of replication, allowing plant cells to replicate at a much slower rate than animal cells.
5 0
3 years ago
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