Each DNA molecule consists of two complementary strands twisted into a (a)   .

The passing of traits from parents to offspring is known as (a)   .

The (a)   is the control center of a cell that contains DNA.

The purified liquid collected after distillation is known as the (a)   .

The (a)   provides oxygen and nutrients to a developing foetus in the mother's uterus.

DNA and RNA are examples of (a)   that carry instructions for building cells and organisms.

The process of removing impurities from a natural water is called water (a)   .

The stage of life when a person’s body begins to develop sexual characteristics is called (a)   .

In physics, energy is often (a)   during certain processes, meaning it is not created or destroyed.

A dark or (a)   -black surface is used in experiments to absorb radiation efficiently.

(a)   is the liquid that passes through a filter during the process of filtration.

In human, gender and whether we have ear lobes or without ear lobes. These are examples of (a)   variations.

Adding (a)   to drinking water can help prevent tooth decay.

In sedimentation, the insoluble impurities settle at the bottom of the water is a layer of (a)   .

Using of ozone, UV light and (a)   are methods usually used to kill microorganisms in water.

In a plant cell, (a)   are the sites where photosynthesis occurs.

A plant cell has a regular and fix shape because it has a (a)   surrounding it.

DNA determines our traits by controlling the kinds of (a)   that a cell makes.

(a)   is a process which a sperm fuses with an ovum to form a zygote.

Fertilisation takes place in the (a)   of the female body.

(a)   twins develop from the splitting of the same zygote, thus they carry the same genetic material.

Cells become specialised for particular functions during a process called cell (a)   .

In DNA, the specific pairing of bases, is crucial for maintaining the molecule's structure and function. A always pairs with (a)   , and G always pairs with C.

In DNA, the specific pairing of bases, is crucial for maintaining the molecule's structure and function. A always pairs with T , and (a)   always pairs with C.

In DNA, the specific pairing of bases, also known as (a)   , is crucial for maintaining the molecule's structure and function.

A fertilised ovum carries (a)   chromosomes in its nucleus.

Through the placenta, oxygen and (a)   from the mother's blood pass to the embryo.

Through the placenta, (a)   and wastes from the embryo pass to the mother's blood for removal.

New cells are formed by a process called (a)   .

Give the English term of 碎屑.

(a)  

Give the English term of 微生物.

(a)  

Give the English term of 明礬.

(a)  

Give the English term of 受精.

(a)  

Give the English term of 懷孕.

(a)  

Give the English term of 蒸汽機模型.

(a)  

Give the English term of 太陽能電池.

(a)  

Give the English term of 分佈.

(a)  

Give the English term of 差異/ 變異.

(a)  

Give the English term of 沉積物.

(a)  

Give the English term of 青春期.

(a)  

Give the English term of 鹼基配對.

(a)  

Give the English term of 遺傳 (n.).

(a)  

Give the English term of 發電機.

(a)  

Give the English term of 不同種類的.

(a)  

Give the English term of 序列.

(a)  

Give the English terms of 保持不變的.

(a)  

Give the English term of 性荷爾蒙.

(a)  

Give the English term of 鏈.

(a)  

Give the English term of 淨化.

(a)