During meiosis, genetic material can be exchanged between homologous chromosomes when matching regions on each chromosome break free and exchange places with each other. What is this process called?

A) crossing over
B) asexual reproduction
C) mitosis
D) mutation


Ans: A) crossing over

Biology & Microbiology

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According to the below figure, which letter corresponds to the area where water is absolutely not reabsorbed?  



A.  A
B.  B
C.  C
D.  D
E.  E

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The timing of seasonal activities of plants and animals is called ________

Fill in the blank(s) with correct word

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Excess sugar produced by plants is stored in the form of ________ in cells of their seeds, fruits, or roots

Fill in the blank(s) with correct word

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Hepatitis B virus

A) Is principally transmitted by blood B) Transmission risks include shared needles, anal intercourse, and heterosexual intercourse. C) Is transmitted to the newborn from chronic carrier mothers. D) Has many chronic carriers E) All these choices are correct

Biology & Microbiology