Are ping pong fish protected animals, and are motionless trees living creatures

Of course not ( lalala la!)

Only nationally protected fish: Chinese sturgeon, sturgeon, Yalu grayling, sturgeon, white sturgeon, cochineal, Qinling salmon, Da's sturgeon, Huang fish, Xinjiang barramundi, Yangtze sturgeon, Tang fish, giant salamander, catch, Dali schizophrenia, tiger frog, yellow-lipped fish, Songjiang perch, C-k's seahorse, flower eel, Sichuan-Shaanxi salmon, Wenchang fish, Iwahara carp.

World-class protected fish: Arcnotus sturgeon and Euroatlantic sturgeon.

This is not a lizard, it's a chameleon, the lizard is a clear gray, and the chameleon color can be changed.

A and D are wrong.

A is wrong, or there are two or 0 chromatids on the old chromosome, and it is impossible to have a pure mountain of chromatids;

D is wrong, there must be a centromere on a chromosome, and it is impossible to have two shirts and pants with a centromere.

Before replication, it is called chromosomes, after replication is called sister chromatids, and after replication, there are two sister chromatids on a chromosome, but before replication, it can only be called chromosomes, and it cannot be said that there are chromatids.

1) Solution: Through the inscription, it can be seen that the base change that occurs on the mRNA is caused by G U, and the corresponding base on the DNA template strand when the mRNA is synthesized is by C A.

2) Solution: The DNA molecule undergoes mutagenesis, and a normal base (set to p) on a site becomes uracil U, assuming that another normal base is M, and the pair is M, then the DNA is U-M, and the two DNA formed after the DNA is replicated once:

u—a，m—m；

After copying again, it forms: u-a, t-a, m-m, m-m, through the information in the title: u-a, a-t, g-c, c-g, you can know:

P may be C or G, which is cytosine or guanine.

If only the nerve center is damaged by the fingers, but the nerve that conducts the receptors to the cerebral cortex is not damaged, then sensation is generated, because it is the cerebral cortex that produces sensation.

It's actually the cerebral cortex that produces the sensation.

Generally, the lower reflex arc is centered in the spinal cord, which connects another neuron to the cerebral cortex, so that people can feel pain when they are injured. Annihilation When people are injured, they first dodge, and then their minds react "Oh, it's hurt!" It hurts! ”

If the nerve center is damaged at the junction of the neurons transmitted to the cerebral cortex, then the pain will not be felt, but if it is only the part of the nerve center that connects the muscles (this sentence is not quite right, there should be efferent nerves, the meaning is clear, that is, the swim can be changed) is damaged, then you can only feel pain and cannot respond.

It's not quite comprehensive, but this kind of high school is more commonly used. The reality is much more complicated than that.

Does this explanation solve the confusion of the landlord?

Sensations are produced by the brain, and the nerve center is not necessarily the brain.

Bloodworm, a larva of a mosquito. The taste is unpleasant. Good for fishing.

This is a bloodworm, which is used for fishing.

Yes, there are living plants, animals, microorganisms in nature. Viruses are all called living things.