Biology Check Test A

Question 1

Why does a species need to reproduce

Answer 1

A species need to reproduce in order to survive

without reproduction a species would go extinct

Question 2

Asexual reproduction is

Answer 2

Asexual reproduction is the production of new organisms from a single organism
The offspring are identical.

Question 3

What is sexual reproduction ?

Answer 3

Sexual reproduction is the production of new organisms by combining genetic information from two different individuals (Male and female)
Offspring show variety.

Question 4

What are gametes?

Answer 4

the gametes are sex cells used in reproduction

E.g
sperm smaller has a tail
egg larger does not have a tail.

Question 5

the definition of fertilisation ?

Answer 5

Fertilisation is the fusion of the egg nucleus and sperm nucleus

Question 6

the Male reproductive systems ?

Answer 6

Are the
PENIS is the organ that enters the females body to deposit sperm

SPERM DUCTS carry sperm from testis to penis

TESTIS produce sperm

Question 7

female reproductive system ?

Answer 7

Are the

OVIDUCT site of fertilisation

UTERUS site of development of foetus

OVARY produces and releases the eggs

VAGINA Site where penis enters the female body

Question 8

how does the embryo obtain nutrients?

Answer 8

the embryo receives nutrients from the mother via the PLACENTA

Question 9

how does smoking drinking and taking illegal drugs affect your baby ?

Answer 9

smoking drinking alcohol and illegal drugs can result in harmful substances passing across the placenta into the feotus
this may affect the development of the feotus

Question 10

why is food required ?

Answer 10

food is required for movement, fighting disease, body heat and growth and tissue repair

Question 11

use of food groups in the body ?

Answer 11

proteins
growth and repair

fat
energy and insulation

carbohydrates
for energy

vitamins and minerals
healthy body and healthy immune system

Question 12

what factors does the total energy needed for the day ?

Answer 12

age
gender
level of activity
body size (height)
energy intske > energy output=gain in mass
energy in take < energy output=Loss in mass

Question 13

What is BMI?

Answer 13

Body Mass Index; a measure of body weight relative to height ro determine if your healthy for your height.

Question 14

What is the BMI formula?

Answer 14

body mass index=weight
———–
height

Question 15

what is pollination ?

Answer 15

pollination is the transfer of pollen from anther to stigma ?

Question 16

The conditions necessary for germination ?

Answer 16

1. water
2. Oxygen
3. Suitable temperature

Question 17

Asexual reproduction in plants ?

Answer 17

plants reproduce asexually through vegetative propagation

Question 18

types of vegetative propagation ?

Answer 18

=tubers
=runners
=plantlets
=bulbs

Question 19

Generic inheritance

Answer 19

Are characteristics determined by genetic information

Each parent passes on genetic information

Some Maybe the same or different

Question 20

What is the genetic information passed on from parents to offspring is carried on through ?

Answer 20

Chromosomes

Question 21

At fertilisation what does the zygote do

Answer 21

The zygote divides producing new body cells all with two sets of chromosomes

Question 22

Genetic information carries ?

Answer 22

Genetic information Carrie’s the code to make proteins which determine our characteristics.

Also Gene’s are sections of DNA carrying the code to make one protein.

Question 23

How many Gene’s do sex cells carry

Answer 23

Sex cells carry one gene for each characteristic

Two sex cells required for sexual reproduction

Each may be the same form (give the same information) or maybe different
Each characteristic is determined by a pair of Gene’s