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joja [24]
4 years ago
7

What is crucial to creating a fossil record of a species?

Biology
1 answer:
Xelga [282]4 years ago
8 0

DNA. DNA is also the most accurate way.

You might be interested in
Please help asap
Lunna [17]

Answer:

The correct answer is -

A. axon

B. dendrite

C. neurotransmitter

D. Synapse

Explanation:

The given diagram is the representation of two neurons connected by the chemical signal. Each neuron has a nerve fiber that carries the nerve signal from one neuron to another covered with sheath, this body is called Axon.

Axon is connected with dendrite, which receives a signal from other neurons and is arise from the cell body of neurons in various numbers. The site where two neurons meet called synapse which is releases neurotransmitters a chemical signal molecule.

3 0
3 years ago
True or false <br> help! 15point n marked as a brainlist
prisoha [69]
1. it’s false! If a predator’s population goes up, their prey’s population isn’t going to increase as well. It’s going to decrease.
5 0
3 years ago
What is the main function of the nervous system?
Andrew [12]

Answer:

The correct answer is to Transport blood to all parts of the body so that gases, nutrients, and waste products are transported to and from the cells.

Explanation:

The nervous system does not do any of the other functions that are in the blue and orange squares. Hope this helps!

5 0
3 years ago
A long folded tube inside the body attached to the stomach where nutrients in the food are absorbed is ________
BigorU [14]

Answer:

The Answer is Small Intestine

Explanation:

A small intestine is attached to the stomach and goes all the way to the anus. Despite it's name it is not really small. It was average size. 20 feet long and about one inch thick in diameter. However, the size can greatly vary in some people from as small as 10 feet to as large as 34 feet.

As our food passes through the small intestine, small fibers start to absorb as much nutrients and minerals it can from the food.

Along with humans it is found in every four-limbed animal and is particular large in herbivors.

7 0
4 years ago
Limitations to the amplification and stability of human tissue-type plasminogen activator expression by chinese hamster ovary ce
pshichka [43]

Chinese  hamster ovary cell production of recombinant tissue‐type plasminogen activator  (t‐PA) was increased by amplification of cotransfected dihydrofolate reeducates cDNA using stepwise adaptation to increasing methotrexate (MTX) concentrations. The highest producing clones were isolated at 5 μM MTX and yielded 26,000 U/106 cells/day t‐PA (43 μg/106 cells/day). Above 25 μM MTX, cell specific t‐PA production rates became increasingly variable and the cDNA copynumbers decreased. No apparent correlation between the cell specific t‐PA production rate and the growth rate was observed upon sub cloning of the amplified cells. When MTX selection was removed, the t‐PA production rate decreased up to tenfold within 40 days; this was accompanied by an up to 60% drop in cDNA copynumber. Subclones isolated after 108 days of culture in the absence of MTX were, on average, sixfold more stable than their parental cells. In culture without MTX, the maximum stable t‐PA production rate obtained (over 250 days) was 7000 ± 750 U/106cells/day (∼12 μg/106 cells/day), approximately threefold lower than the maximum unstable levels of production reached under selective pressure. Taken together, these results define a wide range of the highest t‐PA expression rates obtained under MTX selection, for which stable expression without selection has not been reported

5 0
3 years ago
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