Answer:
cardiac
Explanation:
An electrical stimulus is generated by the sinus node (also called the sinoatrial node, or SA node). This is a small mass of specialized tissue located in the right upper chamber (atria) of the heart. The sinus node generates an electrical stimulus regularly, 60 to 100 times per minute under normal conditions.
Answer: the male duct system is a series of ducts the sperm passes through during ejaculation. these are the components of the male duct system epididymis, ductus deferens, ejaculatory duct, and urethra.
Explanation: Below is a diagram of the male duct system
Answer:
The correct option is D.
Explanation:
Primates refer to an order of animals that include: apes, monkeys, bush babies, etc. The group is very diverse and include up to 350 different species. The smallest primate is mouse lemur while the biggest is wild gorilla. Generally, primate have pairs of prehensile hands and feet, flexible shoulders and hips and well developed brains. They also have hands that are sensitive to touch. Primates have different foraging methods, which they use to acquire their foods.
Answer:
The options
A) T-series bacteriophages
B) retroviruses that require a DNA intermediate
C) single-stranded DNA viruses such as herpesviruses
D) nonenveloped double-stranded RNA viruses
E) linear double-stranded DNA viruses such as adenovirus
The correct answer is B.
B) retroviruses that require a DNA intermediate
Explanation:
Since the baltimore's scheme which was used for virus classifications was included, the most closely likely alternative of virus to the given polio virus that possess a single stranded RNA in these case study is more likely to be retroviruses that needs a DNA intermediate.
Unlike the single-stranded RNA viruses, the retroviruses lack DNA but possess the enzyme called reverse transcriptase used for RNA replication into the host cells DNA and take advantage of the end product for their favour.
I hope this answer helps.
Answer:
No, because it would lead to chromosome mosaicism
Explanation:
Chromosomal mosaicism can be defined as the presence of two or more cell populations with a distinct number and/or type of chromosomes in the cells of an organism. If the cell would split before chromosome duplication, it would lead to the fact that some cells would have one chromosome of the homologous pair being duplicated, while other cells would have duplicated the other one. In consequence, this process would produce a genomic imbalance between different cell populations that would be expected to be lethal for the organism.
