Which of the following events is believed to have occurred first?

a. endosymbiotic origin of mitochondria
b. origin of cyclic pathway of photosynthesis
c. endosymbiotic origin of chloroplasts
d. origin of noncyclic pathway of photosynthesis


b

Biology & Microbiology

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Which of the following is/are the most common cause of pharyngitis?

A) Escherichia coli B) Staphylococcus aureus C) Streptococcus pyogenes D) viruses

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The vagina meets the uterus at the ________

Fill in the blank(s) with correct word

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The primary difference between meiosis and mitosis is the

What will be an ideal response?

Biology & Microbiology

Facial abnormalities such as a small mouth, smooth philtrum, and micrognathia may indicate further defects in which other organ?

A. Gonads B. Heart C. Liver D. Lungs E. Spleen

Biology & Microbiology