science revision

Question 1

definition of asexual reproduction

Answer 1

generates offspring that are genetically identical to a single parent

Question 2

Binary fission

Answer 2

Binary fission is the process of one cell simply dividing into two. It is most commonly found in bacteria

Question 3

parthenogenesis

Answer 3

reproductive strategy that involves development of a female (rarely a male) gamete (sex cell) without fertilization

Question 4

Budding

Answer 4

a new organism is developed from a small part of the parent’s body. A bud which is formed detaches to develop into a new organism.

Question 5

fragmentation

Answer 5

cloning where one organism is divided into minor fragments. Once divided, these fragments develop into individual ones which are fully grown

Question 6

vegetative reproduction

Answer 6

a new plant grows from a fragment of the parent plant or grows from a specialized reproductive structure

Question 7

hermaphrodites

Answer 7

an animal or plant having both male and female reproductive organs, structures, or tissue

Question 8

sexual reproduction def

Answer 8

The process of combining the male gamete, or sperm, with the female gamete, or ovum

Question 9

external fertilisation

Answer 9

a mode of reproduction in which a male organism’s sperm fertilizes a female organism’s egg outside of the female’s body.

Question 10

internal fertilisation

Answer 10

the process of fertilization that occurs inside the body of an individual

Question 11

rolls of sex cells

Answer 11

There are two kinds of sex cells — sperm and eggs. When a sperm meets an egg, it can fertilize it and create a zygote

Question 12

benefits of sexual reproduction

Answer 12

increases genetic diversity in the population.

Question 13

benefits of asexual reproduction

Answer 13

• the population can increase rapidly when the conditions are favourable.
• only one parent is needed.

Question 14

effects of environment on parental care

Answer 14

r strategists are in an unstable environment and k strategist are in a stable environment

Question 15

r strategist

Answer 15

R-selected species are small, fast-growing organisms in unstable environments, producing many offspring

Question 16

k strategist

Answer 16

K-selected species are large, slow-growing organisms in stable environments, investing heavily in a few offspring.

Question 17

parts and functions of the female reproductive system

Answer 17

The female reproductive system comprises the ovaries, fallopian tubes, uterus, cervix, and vagina. Its main functions include producing eggs (ova), facilitating fertilization, nurturing the developing embryo/fetus, and allowing for childbirth and menstruation

Question 18

parts and function of the male reproduction system

Answer 18

The male reproductive system includes the testes for sperm production and accessory organs like the epididymis, vas deferens, seminal vesicles, prostate gland, and bulbourethral glands, aiding in sperm transport and semen production

Question 19

female reproductive flower parts

Answer 19

Stigma: Receives pollen grains.
Style: Connects the stigma to the ovary.
Ovary: Contains ovules, which are the female gametes (egg cells).