Bacteria reproduce _______ through cell fission. However, in another process, a tube of cytoplasm can temporarily connect two bacterial cells. Some DNA passes through this tube. Like ________ reproduction, this process causes genetic variation. However, it does not produce offspring.

If an organism is successful in a particular environment,

______________ reproduction is ____________.

However, if an environment changes, some offspring of

_________ reproduction may have a better chance of survival and reproductive success than others in a population because of _____________.

Which is label A indicating?

Which is label B indicating?

Which is label D indicating?

Which is label C indicating?

The development of insects such as the fruit fly, Drosophila, consists of two phases. The larva emerges from the egg and after a period of growth, changes into an adult. The adult insect is very different from the larva. The precursor cells for the adult structures are present in small clusters (the imaginal discs) inside the larva. During the larval stage the disc cells do not play a role. However, during metamorphosis the disc cells start to divide and develop into specific adult structures. Compare and contrast the Drosophila development to the development of C. elegans.

The development of insects such as the fruit fly, Drosophila, consists of two phases. The larva emerges from the egg and after a period of growth, changes into an adult. The adult insect is very different from the larva. The precursor cells for the adult structures are present in small clusters (the imaginal discs) inside the larva. During the larval stage the disc cells do not play a role. However, during metamorphosis the disc cells start to divide and develop into specific adult structures. Compare and contrast the Drosophila development to the development of C. elegans.

Japanese scientists were able to create pluripotent stem cells (iPS), a type of stem cell that is similar to embryonic stem cells. The researchers were then able to grow heart and brain cells from these stem cells. Which type of cell is described by the following statement: are made from adult cells

Japanese scientists were able to create pluripotent stem cells (iPS), a type of stem cell that is similar to embryonic stem cells. The researchers were then able to grow heart and brain cells from these stem cells. Which type of cell is described by the following statement: are made from the inner cell mass of the blastocyst

Japanese scientists were able to create pluripotent stem cells (iPS), a type of stem cell that is similar to embryonic stem cells. The researchers were then able to grow heart and brain cells from these stem cells. Which type of cell is described by the following statement: are made from mouse fibroblasts

Japanese scientists were able to create pluripotent stem cells (iPS), a type of stem cell that is similar to embryonic stem cells. The researchers were then able to grow heart and brain cells from these stem cells. Which type of cell is described by the following statement: can possibly be used for therapeutic treatments

Japanese scientists were able to create pluripotent stem cells (iPS), a type of stem cell that is similar to embryonic stem cells. The researchers were then able to grow heart and brain cells from these stem cells. Which type of cell is described by the following statement: heart, brain, and other differentiated cells can grow from them

At present, stem cell–based therapies are the clinical standard of care for only a few conditions, including leukemia and macular degeneration. Before stem cell therapies can be ethically approved for other conditions, all of the safety assessments below should be confirmed except for which one?

What structure is found in prokaryotic cells but not eukaryotic cells?

The ________ is the point of attachment for sister chromatids.

The ________ consists of coiled and condensed chromatin.

The ________ is an area from which the spindle fibers extend.

The events of mitosis are divided into four phases.

1 Prophase: chromatin forms visible chromosomes; spindles form

2 Metaphase: chromosomes move to the equator of the spindle; centromeres of duplicated chromosomes are aligned

3 Anaphase: centromeres split and chromatids are pulled to opposite poles of the cell; each pole receives the same number and kinds of chromosomes as the parent cell

4 Telophase: daughter cells are formed; nuclear envelopes reappear and chromosomes become chromatin

added to

Which phase is shown in #1?

The events of mitosis are divided into four phases.

1 Prophase: chromatin forms visible chromosomes; spindles form

2 Metaphase: chromosomes move to the equator of the spindle; centromeres of duplicated chromosomes are aligned

3 Anaphase: centromeres split and chromatids are pulled to opposite poles of the cell; each pole receives the same number and kinds of chromosomes as the parent cell

4 Telophase: daughter cells are formed; nuclear envelopes reappear and chromosomes become chromatin

added to

Which phase is shown in #3?

The events of mitosis are divided into four phases.

1 Prophase: chromatin forms visible chromosomes; spindles form

2 Metaphase: chromosomes move to the equator of the spindle; centromeres of duplicated chromosomes are aligned

3 Anaphase: centromeres split and chromatids are pulled to opposite poles of the cell; each pole receives the same number and kinds of chromosomes as the parent cell

4 Telophase: daughter cells are formed; nuclear envelopes reappear and chromosomes become chromatin

added to

Which phase is shown in #4?

The events of mitosis are divided into four phases.

1 Prophase: chromatin forms visible chromosomes; spindles form

2 Metaphase: chromosomes move to the equator of the spindle; centromeres of duplicated chromosomes are aligned

3 Anaphase: centromeres split and chromatids are pulled to opposite poles of the cell; each pole receives the same number and kinds of chromosomes as the parent cell

4 Telophase: daughter cells are formed; nuclear envelopes reappear and chromosomes become chromatin

added to

Which phase is shown in #2?

The p53 protein is involved in DNA repair and in triggering cell death when repair is not possible. Which of the following is not a reason why some cancers are associated with defective p53 genes?

Which of the following happens when cancer occurs?

Which of the following statements is not typical for cancer cells?

The cells are differentiated and specialized

The cells are non-differentiated cells

Cells have an abnormal nucleus

Cells have a normal nucleus

The cells undergo metastatis

Cells with DNA damage undergo apoptosis

Which phase of the cell cycle is described?

At the end of this phase, each chromosome is made up of two chromatids.

Which phase of the cell cycle is described?

Chromatids are distributed to the two daughter nuclei.

Which phase of the cell cycle is described?

Proteins and other materials needed for cell division are synthesized.

Which phase of the cell cycle is described?

Organelles and materials needed for DNA synthesis are made.

This process decreases the number of body cells.

This process increases the number of body cells.

This process repairs injuries.

This process regulates the cell cycle.

This process causes death of abnormal cells.

This process produces specialized cells.

Look at the picture. What does it represent?

Look at the picture. What does it represent?

Analyze the cell cycle diagrams of two different types of cells. Compare and contrast the length of time each cell takes to complete each phase of the cycle. Match the event to the correct phase of the cell cycle: The cell nucleus and the cytoplasm divide among two new cells.

Analyze the cell cycle diagrams of two different types of cells. Compare and contrast the length of time each cell takes to complete each phase of the cycle. Match the event to the correct phase of the cell cycle: DNA is synthesized, and single-stranded chromatids become double stranded.

Analyze the cell cycle diagrams of two different types of cells. Compare and contrast the length of time each cell takes to complete each phase of the cycle. Match the event to the correct phase of the cell cycle: Cells grow at a rate that varies between the two cell types.

Analyze the cell cycle diagrams of two different types of cells. Compare and contrast the length of time each cell takes to complete each phase of the cycle. Match the event to the correct phase of the cell cycle: Cells grow at a rate that is the same in the two cell types.

Analyze the cell cycle diagrams of two different types of cells. Compare and contrast the length of time each cell takes to complete the G1 phase of the cycle. The two cells are provided with nutrients for growth. After 35 hours, which is the most likely observation of the cells?