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4 years ago

What are the quick protective reactions that occur within your nervous system called?

1 answer:

5 0

They are called reflexes.
Reflexes are quick, protective reactions that occur within your nervous system. They are involuntary actions, meaning that they happen regardless of whether you want them to happen or not. They represent reactions to a certain stimulus.

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A reflex, like automatically removing your hand from a hot stove, involves pain messages sent to the spinal cord by way of _____

maksim [4K]

I believe it’s A) sensory; motor

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3 years ago

Read 2 more answers

Scientists use DNA sequencing to understand relationships among life on Earth. The chart illustrates differences between five sp

OlgaM077 [116]

Answer:

With respect to the differences in the DNA sequence of six species, including the human one, it is true that the DNA sequences may vary but the aminoacid sequences are identical.

Explanation:

Options for this question:

<em>The DNA sequences may vary but the amino acid sequences are identical. </em>
The nitrogen bases in the nucleotides must also be different in each.
The process in producing additional DNA, replication, is identical in all six.
The process of producing DNA, or replication, varies due to the differences in the DNA codes.

The different species that exist have specific genomes for each of them, this is the <u>genetic information contained in the DNA varies from one species to another</u>, as can be seen in the scheme (see image). However, the genetic code is universal, and does not vary from one species to another.

The genetic code is found in the RNA molecule and is a sequence of nucleotides that, organized in triplets (codons), are responsible for the synthesis of specific amino acids. An RNA molecule contains the information necessary for protein synthesis.

The scheme shows the differences of five species with respect to the human, based on the respective DNA sequences. But what it does not show is a universally accepted truth, that the nucleotide sequence encoding an amino acid is the same for each of these species.

Learn more:

Genetic code brainly.com/question/15338

3 0

3 years ago

6. Why does meiosis increase genetic variation in the offspring, but mitosis does not? (1 point)

brilliants [131]

Meiosis involves crossing over where chromosomes exchange genetic segments, resulting in different sets of chromosomes. Each time an egg or sperm created, it is different due to this recombination. Mitosis on the other hand is non-sex cells replicating exact copies of themselves which lead to no genetic variation as they aren't involved in producing offspring.

3 0

3 years ago

An organism is discovered that thrives in both the presence and absence of oxygen. Interestingly, as oxygen is removed from the

melisa1 [442]

Answer:

It is a facultative anaerobic organism.

Explanation:

This organism makes ATP (energy provider molecule) by aerobic respiration in presence of oxygen, but when oxygen is removed it is capable of switching to fermentation (sugar consumption increases and growth rate decreases).

This happens because fermentation is much less effective at producing ATP and therefore there is not enough energy for growth.

This organisms are called facultative anaerobic.

Organisms with this type of metabolism include bacteria like Escherichia coli and Salmonella or yeast like Saccharomyces cerevisiae.

6 0

3 years ago

What does photosynthesis produce? What are these products used for?

Doss [256]

Answer:

photosynthesis produces glucose which is stored as starch in the plant.

Explanation:

6H₂O + 6CO₂ -----> C₆H₁₂O₆ + 6O₂(as a waste product for plants)

Photosynthesis reduces carbon dioxide in the atmosphere which reduces the green house gasses in the atmosphere which reduces the green house effect.

7 0

3 years ago