Q: During fetal development of the heart, what does the bulbus cordis develop into? Read this paragraph and choose the correct option from the provided answers: Following ventricular repolarization, the ventricles begin to relax, and pressure within the ventricles drops. When the pressure falls below that of the atria, blood moves from the atria into the ventricles, opening the atrioventricular valves and marking one complete heart cycle. 35 Afterload represents the resistance within the arteries to the flow of blood ejected from the ventricles. If uncompensated, if afterload increases, flow will decrease. In order for the heart to maintain adequate flow to overcome increasing afterload, it must pump more forcefully. This is one of the negative consequences of high blood pressure or hypertension. 37 After fusion of the two endocardial tubes into the single primitive heart, five regions quickly become visible. From the head, these are the truncus arteriosus, bulbus cordis, primitive ventricle, primitive atrium, and sinus venosus. Contractions propel the blood from the sinus venosus to the truncus arteriosus. About day 23, the heart begins to form an S-shaped structure within the pericardium. The bulbus cordis develops into the right ventricle, whereas the primitive ventricle becomes the left ventricle. The interventricular septum separating these begins to form about day 28. The atrioventricular valves form between weeks five to eight. At this point, the heart ventricles resemble the adult structure. Choices: - right atrium - last ventricle - left atrium - right ventricle A:
right ventricle

(Question)
Q: Within the petals are two whorls of fertile floral organs that produce what? Read this paragraph and choose the correct option from the provided answers: Choices: - leaves - toxins - fibers - spores A:
(Answer)
spores

Ques: Q: Earth goes through regular changes in its position relative to? Read this paragraph and choose the correct option from the provided answers: Earth goes through regular changes in its position relative to the Sun. Its orbit changes slightly. Earth also wobbles on its axis of rotation. The planet also changes the tilt on its axis. These changes can affect Earth's temperature. Choices: - the moon - saturn - mars - the sun A:
Ans: the sun

(Q).
Q: What mammalian feature serves functions such as filtration and keeping the body warm? Read this paragraph and choose the correct option from the provided answers: Hair serves many functions such as acting as a filter and keeping the body warm. Choices: - shivering - sensory organs - sweat - hair A:
(A).
hair

Ques:Q: Red litmus paper turns what color when placed in a basic solution? Read this paragraph and choose the correct option from the provided answers: Red litmus paper turns blue when placed in a basic solution. Choices: - white - orange - pink - blue A:

Ans:blue

Question: Q: Deletions remove one or more what from the dna? Read this paragraph and choose the correct option from the provided answers: Similar to chromosomal alteration mutations, deletion or insertion mutations add or remove genetic information. Small deletions or insertions in the DNA will alter the reading frame. Deletions remove one or more nucleotides from the DNA, whereas insertions add one or more nucleotides into the DNA. These mutations in the coding region of a gene may also alter the splicing of the mRNA, known as a splice site mutation . Mutations which alter the reading frame are known as frameshift mutations . Splice site mutations and frameshift mutations both can dramatically change the mRNA, altering the final protein product. Choices: - codons - exons - genes - nucleotides A:
Answer:
nucleotides