Question 1

Humans are born much less well developed than most mammals. Why might this be?

Accepted Answer

A)   The mother can't physically take a longer pregnancy.
B)   Humans have such big brains, if the fetus grew any bigger the head wouldn't fit through the cervix.
C)   Humans need special nurturing as babies.
D)   The human placenta doesn't last long enough to support a longer pregnancy.
E)   Probably no real reason, it's just the way it's worked out.

Question 2

Which is the correct sequence of steps in meiosis I?

Accepted Answer

A)   Cytokinesis, telophase, anaphase, metaphase, prophase, interphase
B)   Interphase, metaphase, prophase, anaphase, telophase, cytokinesis
C)   Anaphase, interphase, metaphase, prophase, telophase, cytokinesis
D)   Metaphase, anaphase, prophase, telophase, cytokinesis, interphase
E)   Interphase, prophase, metaphase, anaphase, telophase, cytokinesis E

Question 3

What type of cell has organelles (a human cell is one of these)?

Accepted Answer

The answer of What type of cell has organelles (a...

Question 4

Cell theory says every living thing is made of cells and that

Accepted Answer

A)   Cells only come from other cells.
B)   Cells can reproduce.
C)   Cells are found everywhere on Earth.
D)   Cells produce embryos.
E)   When cells are out of balance, a person is unhealthy.

Question 5

All diploid cells in an organism contain the same DNA or genetic material. True or False?

Accepted Answer

A)   False. The genetic material is scrambled at every replication, so not every gene is passed along.
B)   True. But only the genes necessary for a given cell to do its particular "job" are expressed.
C)   True. All the genes are necessary for every cell to do its "job."
D)   False. It would be a waste of energy to copy the chromosomes unnecessary for a cell to do its particular job, so they are not all copied.
E)   False. Only the genes expressed for the "job" of that cell get passed along

Question 6

In many cases it seems like it's quite easy to get pregnant. In a single fertility cycle, what are the actual percentages of acts of intercourse (without contraception) that result in fertilization and pregnancy?

Accepted Answer

The answer of In many cases it seems like it's...

Question 7

When embryos separate later than nine days after conception, there is a 50% chance of the resulting twins being conjoined.

Accepted Answer

A) True 
 B)False

Question 8

Which part of a cell maintains its shape and allows it to move?

Accepted Answer

The answer of Which part of a cell maintains its...

Question 9

Approximately when might a mother-to-be be able to feel the fetus moving around?

Accepted Answer

A)   By month 7
B)   By months 4-5
C)   By month 2
D)   Almost immediately
E)   Possibly not until months 8-9

Question 10

Which of the following is NOT a function of the endoplasmic reticulum?

Accepted Answer

A)   Synthesis of fats and lipids
B)   Breakdown of toxins
C)   Produces proteins for cell structure and regulation
D)   Digests waste materials and recycles molecules
E)   Contains ribosomes, which thread proteins together

Question 11

Which of the following is NOT part of the endomembrane system of a eukaryotic cell?

Accepted Answer

A)   Mitochondria
B)   Lysosome
C)   Golgi apparatus
D)   Endoplasmic reticulum
E)   Nucleus A

Question 12

How do identical twins occur?

Accepted Answer

A)   One sperm cell fertilizes two eggs.
B)   Two sperm cells fertilize one egg and the egg splits.
C)   One sperm fertilizes one egg and the egg splits early in development.
D)   Gene expression goes wrong and two embryos develop simultaneously.
E)   It's hereditary.

Question 13

The idea that every living organism is made of cells and cells only come from other cells is called what?

Accepted Answer

The answer of The idea that every living organism is...

Question 14

What hormone maintains contractions?

Accepted Answer

Oxytocin

Question 15

What happens in gastrulation, and what happens when it goes wrong?

Accepted Answer

A)   Embryonic cells differentiate into the 200 types found in humans; cells don't do what they're supposed to do.
B)   Genes express differently depending on which cell type they are in; cells don't do what they're supposed to do.
C)   Embryonic cells move to locations where they grow into particular organs; organs don't develop correctly.
D)   Embryonic cells divide and replicate; the embryo doesn't grow correctly.
E)   Layers of embryonic tissue develop out of cells; organs don't develop correctly.

Question 16

Scientists can't induce twinning in humans to learn how it works because that would be unethical. What do they do instead?

Accepted Answer

Induce twi...

Question 17

This organelle produces ATP to power the cell.

Accepted Answer

A)   Nucleus
B)   Mitochondria
C)   Golgi apparatus
D)   Endoplasmic reticulum
E)   Lysosome

Question 18

Most conjoined twins survive. True or False?

Accepted Answer

A)   True. With modern medicine, they can usually be separated.
B)   False. Few survive to birth, and of those, more than 75% will not survive.
C)   True. Societal accommodations and tolerance of physically challenged individuals has greatly increased.
D)   False. Most make it to birth, but of those more than 75% will not survive.
E)   True. Most survive initially at birth, but then most die of physiological complications.

Question 19

What might ultrasound imaging be used for in an adult?

Accepted Answer

Examining internal s...

Question 20

At fertilization, an egg and sperm cell fuse. What is the resulting cell called?

Accepted Answer

The answer of At fertilization, an egg and sperm cell...

Exam 3: Human Development

Humans are born much less well developed than most mammals. Why might this be?

Correct AnswerverifiedShow Answer

Which is the correct sequence of steps in meiosis I?

Correct AnswerverifiedE

What type of cell has organelles (a human cell is one of these)?

Correct AnswerverifiedShow Answer

Cell theory says every living thing is made of cells and that

Correct AnswerverifiedShow Answer

All diploid cells in an organism contain the same DNA or genetic material. True or False?

Correct AnswerverifiedShow Answer

In many cases it seems like it's quite easy to get pregnant. In a single fertility cycle, what are the actual percentages of acts of intercourse (without contraception) that result in fertilization and pregnancy?

Correct AnswerverifiedShow Answer

When embryos separate later than nine days after conception, there is a 50% chance of the resulting twins being conjoined.

Correct AnswerverifiedShow Answer

Which part of a cell maintains its shape and allows it to move?

Correct AnswerverifiedShow Answer

Approximately when might a mother-to-be be able to feel the fetus moving around?

Correct AnswerverifiedShow Answer

Which of the following is NOT a function of the endoplasmic reticulum?

Correct AnswerverifiedShow Answer

Which of the following is NOT part of the endomembrane system of a eukaryotic cell?

Correct AnswerverifiedA

How do identical twins occur?

Correct AnswerverifiedShow Answer

The idea that every living organism is made of cells and cells only come from other cells is called what?

Correct AnswerverifiedShow Answer

What hormone maintains contractions?

Correct AnswerverifiedOxytocin

What happens in gastrulation, and what happens when it goes wrong?

Correct AnswerverifiedShow Answer

Scientists can't induce twinning in humans to learn how it works because that would be unethical. What do they do instead?

Correct AnswerverifiedInduce twi...View AnswerShow Answer

This organelle produces ATP to power the cell.

Correct AnswerverifiedShow Answer

Most conjoined twins survive. True or False?

Correct AnswerverifiedShow Answer

What might ultrasound imaging be used for in an adult?

Correct AnswerverifiedExamining internal s...View AnswerShow Answer

At fertilization, an egg and sperm cell fuse. What is the resulting cell called?

Correct AnswerverifiedShow Answer

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E

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A

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Oxytocin

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Induce twi...
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Examining internal s...
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