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Oogenesis
The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.
Cell Division
Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:
Cytoplasm of a plant cell divides by the process of_____ .
a. telekinesis c. fission
b. nuclear division d. cytokinesis
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- Cytoplasm of a plant cell divides by the process of ________. a. telekinesis c. fission b. nuclear division d. cytokinesisInterphase is the part of the cell cycle when________ . a. a cell ceases to function b. a cell forms its spindle apparatus c. a cell grows and replicates its DNA d. mitosis proceedsDuring cytokinesis, a contractile ring of actin microfilament forms the ______________ and pinches the cell apart. A. Kinetochores B. Cleavage furrow C. Equator D. Asters
- In the image, you can see one cell that is in the process of mitosis. (Note that chromosomes are stained dark blue.) In which stage is this cell currently? A. Telophase B. Metaphase C. Interphase D. Prophase E. Cytokinesis F. AnaphaseThe spindle apparatus is formed during the __________ phase of mitosis A. Anaphase B. Metaphase C. Prophase D. TelophaseDuring which of the following mitotic stages to microtubules shrink to pull chromosomes to the MTOC? a. Prophase b. Metaphase c. Anaphase d. Telophase e. Cytokinesis
- DNA or deoxyribonucleic acid is the hereditary material in humans and almost all other organisms. Nearly every cell in a person's body has the same DNA. This, in turn, replicates in the non-dividing phase of the cell cycle which is a. telophase b. cytokinesis c. metaphase d. interphaseThe phases of cell cycles in order are O a. Metaphase, anaphase, telophase, interphase, prophase and cytokinesis O b. Metaphase, anaphase, interphase, prophase, telophase and cytokinesis O c. Interphase, telophase, cytokinesis, prophase, metaphase and anaphase O d. Cytokinesis, telophase, anaphase, metaphase, prophase and interphase O e. Anaphase, telophase, cytokinesis, interphase, prophase and metaphase O f. Interphase, prophase, metaphase, anaphase, telophase and cytokinesis g. Prophase, interphase, metaphase, anaphase, telophase and cytokinesis What is the purpose of using sodium bicarbonate (NaHCO3) in the photosynthesis experiment? a. None of the other choices is valid O b. To provide dissolved dissolved 02 O c. To provide dissolved dissolved CO2 O d. To provide dissolved waterMatch each stage with the events listed. ___ metaphase a. sister chromatids move apart ___ prophase b. chromosomes condense ___ telophase c. new nuclei form ___ interphase d. chromosomes aligned midway ___ anaphase between spindle poles ___ cytokinesis e. G1, S, G2 f. cytoplasmic division
- When does cell plate form during cell division. A. At the completion of animal cells- mitosis during cytokinesis B- at the completion of plant cell mitosis- during cytokinesis C- during interphase D- in the middle of animal cell mitosisIn eukaryotic cells, the nuclear envelope has to disappear in order to directly permit _____. A. the splitting of centrosomes B. the attachment of microtubules to kinetochores C. the extra condensation of chromosomes D. cytokinesisIn the cells of some organisms, mitosis occurs without cytokinesis. This will result in a. cells with more than one nucleus b. destruction of chromosomes c. cells lacking nuclei d. cell cycles lacking an S phase