Neurons and neurotransmitters didn’t see first answer please make Brainlyist have a good day
Answer:
Answer is C.
Explanation:
A. The vessel length is pretty much constant. The body can't length or shorten blood vessels.
B. Blood viscosity is also fairly constant because the composition of blood cannot change quickly enough to change resistance as needed.
C. This is the main way resistance is controlled. The smooth muscle surrounding blood vessels can rapidly respond to hormonal or metabolic stimuli and contract/relax to adjust diameter.
D. Again, temperature is fairly constant in the body and would not be a good way to alter resistance.
Answer:
B. Atoms are made of particles that have a negative charge.
Explanation:
Thomas is a chemist which performs an experiment using cathode ray tube. In this experiment he observed that all atoms contains electron which has negative charge. He concluded that most of mass of atom is present in the nucleus of an atom. In nucleus, proton and neutron are present which are a heavy particles and most of the space around the nucleus is empty.
<u>Answer</u>:
1. A. abc*ghijklmn
Through deletion, the part of the chromosome -def* was lost.
2. C. 0%
Two parents with B and AB will produce children with A, B or AB blood types. Never an O child. In order for this to be possible, the father would have to be A, B or O.
3. John
The gel electrophoresis method will separate the DNA according to molecular size. This pattern is unique to each individual.
4. B. Abnormal female - 47 chromosomes.
On chromosome pair 21 it can be observed a third copy of this chromosome. This is caused by the Down syndrome, also known as trisomy 21. It is a female, because the last chromosome pair, number 23 has two identical copies, commonly denoted as XX.
Answer:
The DNA carrying a silent mutation will have no gene expression or result on the phenotype or physical appearance of the organism. Silent mutations code for the same amino acid resulting in more genetic diversity, having a genotypic advantage, but providing no noticeable differences.
Explanation:
