Science

Question 1

During what phase do spindle fibers form

Answer 1

Prophase

Question 2

What is the final phase of mitosis?

Answer 2

Telophase

Question 3

Mitosis results in the form of what?

Answer 3

Two identical daughter cells

Question 4

What is the longest phase of the cell cycle?

Answer 4

Interphase

Question 5

What is the main difference between animal and plant cells

Answer 5

Animal cells have a cell membrane, plant cells have a cell wall

Question 6

During what phase do chromosomes first become visible

Answer 6

Prophase

Question 7

What is the purpose of mitosis?

Answer 7

To create two identical daughter cells and replace worn out or lost cells

Question 8

What is the result of meiosis

Answer 8

Four different daughter cells

Question 9

Meiosis has how many stages?

Answer 9

2

Question 10

What is the purpose of meiosis?

Answer 10

To create gamete cells for sexual reproduction

Question 11

What phase do chromosomes cross over?

Answer 11

Prophase

Question 12

What is the final phase of meiosis?

Answer 12

Telophase stage 2

Question 13

Describe two examples of technologies that humans use to select traits of organisms.

Answer 13

1. Selective breeding: A way to select and breed living organisms to produce offspring with more desirable traits
2. Genetic engineering: a process that changes the DNA of an organism directly.

Question 14

Who were the earliest “Plant technologists” in North America?

Answer 14

The indigenous people

Question 15

What crop did the indigenous people develop and how?

Answer 15

Corn from teosinte, they did it by using selective breeding

Question 16

What are some advantages in biotechnology?

Answer 16

Resistance to disease, better taste or appearance, health improvements

Question 17

What are some disadvantages to biotechnology?

Answer 17

Weeds will become resistant to herbicide, reduction in genetic variation, genetic defects

Question 18

What is a fertilized egg called?

Answer 18

A zygote

Question 19

What are gametes?

Answer 19

Specialized sex cells

Question 20

What are male gametes?

Answer 20

Sperm cells

Question 21

What are female gametes?

Answer 21

Egg cells

Question 22

What does the fertilized egg implant itself in? Why?

Answer 22

The uterus lining, because of the warmth, moisture, and nutrition

Question 23

What must the male reproductive system do?

Answer 23

To maintain, produce, and transport sperm cells

Question 24

What must the female reproductive system do?

Answer 24

Create hormones and make it possible to get pregnant.

Question 25

During ovulation, how many eggs are generally released?

Answer 25

One

Question 26

How many sperm can fertilize an egg?

Answer 26

One

Question 27

What happens to the endometrial lining if the egg is not fertilized?

Answer 27

It will thicken and shed during menstruation

Question 28

How long is the menstrual cycle?

Answer 28

28-29 days lasting for up to 2-7 days

Question 29

What is the purpose of IUD

Answer 29

To prevent pregnancy.

Question 30

Sex is determined by what at fertilization?

Answer 30

Determined by sex chromosomes in SPERM

Question 31

What are the two sex chromosomes

Answer 31

X and Y

Question 32

What is the female and male sex chromosome?

Answer 32

X = female
Y = male

Question 33

How is pregnancy divided?

Answer 33

In three trimesters

Question 34

How long does the fetus stage last for?

Answer 34

From 9th week until birth

Question 35

What are some lifestyle choices that can affect a developing fetus?

Answer 35

Smoking, drinking, drugs

Question 36

What is in-vitro fertilization?

Answer 36

When an egg and sperm cell are placed in a dish to become an embryo, later transfered into a uterus.

Question 37

Why would someone partake in in-vitro fertilization?

Answer 37

When people who want children struggle to get pregnant.