Answer:
Nitrogenous bases have two distinct families known as purines and pyrimidine, nitrogenous are the building blocks or monomer units of the nucleic acids.
The major and significant difference between purines and pyrimidines is the difference in their structures-
The purines are divided into two different bases called adenine and guanine and each of them have a two-ringed structure formed with a 9-membered molecule and 4 nitrogen atoms which makes it a large in size than purines.
The pyrimidines are divided into 3 bases that are cytosine, uracil, and thymine and all these have only one single ring of six members and 2 nitrogen atoms. These are smaller in size.
The earlobe trait is denoted by E and e alleles, whereas the eye trait is denoted by B and b alleles. The Punnet square allows identifying the expected proportions in the progeny.
<h3>The Punnett square and inheritance </h3>
The Punnett square is a diagram used to represent the gamete combinations in order to estimate genotypes and phenotypes in the progeny.
The earlobe trait is denoted by E and e alleles, thereby there are two types of gametes in heterozygous individuals.
In this case:
E e
E EE Ee
e Ee ee
Moreover, the eye trait is denoted by B and b alleles, thereby there are two types of gametes in heterozygous individuals.
In this case:
B b
B BB Bb
b Bb bb
Learn more about Punnett square here:
brainly.com/question/9582290
Answer:
Explanation:
Muscle contraction is stimulated by the movement of an action potential moving along a nerve fiber to the muscles. This event follow some series of process before being stimulated.
1. The impulse arrives at the synapse and travels through the transverse tubules.
2. The muscle impulse reaches the sarcoplasmic reticulum and calcium is released.
3. Calcium floods the sarcoplasm and binds to troponin molecules leaving active sites.
4. Tropomyosin molecules bind to exposed active sites, linking actin and myosin.
5. Thin filaments are pulled over the thick filaments.
6. The muscle fiber shortens and contracts.
A DRUG KILLS ONLY THE RAPID GROWING CELLS is most likely a cancer treatment.
A. a drug that kills only rapidly dividing cells
<u>Explanation:</u>
Chemotherapy is a drug treatment that uses powerful chemicals to kills the fast-growing cell in your body. The cancer cells are rapidly growing cells, so it can be cured by the effective drug to cure cancer in the body. chemotherapy is most often used to treat cancer.
Since the cancer cells grow and multiply much more quickly than most cells in our body. It is given with the curative intent or it may prolong life on to reduce symptoms in the cancer patients.
Answer:
C is the answer
Explanation:
my teacher told us it in like 4th grade
