Theory

CH16 - REPRODUCTION

What crosses the placenta from fetal blood to maternal blood in larger quantities than from maternal blood to fetal blood? A amino acids B carbon di...

2009 Summer

Theory

CH16 - REPRODUCTION

Fruits can be dispersed by animals or by wind. The table contains descriptions of four fruits. Which fruit will be dispersed by wind?  

2009 Summer

Theory

CH16 - REPRODUCTION

The experiment shown in the diagram was set up to see what conditions are needed for seeds to germinate. Except for tube number 5, all tubes are kept ...

2009 Summer

Theory

CH16 - REPRODUCTION

How does the rhythm method of family planning work?A. A physical barrier stops sperms reaching the egg.B. Implantation is prevented.C. Intercourse is ...

2009 Winter

Theory

CH16 - REPRODUCTION

The diagram shows a flower in section.Where will fertilisation occur?[Image of flower]

2009 Winter

Theory

CH16 - REPRODUCTION

The graph shows the changes in the dry masses of two similar samples of seeds from the start of germination.What causes the change in dry mass after d...

2009 Winter

Theory

CH16 - REPRODUCTION

The diagram shows a bean seed when planted and the same seed two days later. Which conditions are necessary for these changes to occur? [Table_1] ...

2009 Winter

Theory

CH16 - REPRODUCTION

The diagram shows a flower in section. Where will fertilisation occur?

2009 Winter

Theory

CH16 - REPRODUCTION

The diagram shows a bean seed when planted and the same seed two days later. Which conditions are necessary for these changes to occur?[Table_1]

2009 Winter

Theory

CH16 - REPRODUCTION

The graph shows the changes in the dry masses of two similar samples of seeds from the start of germination. What causes the change in dry mass aft...

2009 Winter

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

(a) (i) State the name of the gas exchange surface in humans. ...........................................................................................

2022 Spring

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

(a) Fig. 2.1 is a photomicrograph showing the fertilisation of one human egg cell. [Image_1: Photomicrograph of fertilisation with label 'sperm']Descr...

2022 Spring

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

(a) A scientist investigated the effect of temperature on the mass of leaves picked from a tea plant, *Camellia sinensis*.• Three samples of leaves ...

2022 Spring

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

(a) Fig. 4.1 is a diagram of Vibrio cholerae, the bacterium that causes cholera. (i) Describe two similarities and two differences between a palisade ...

2022 Spring

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The Arabian oryx and the northern white rhinoceros are both mammals.Fig. 5.1 is a photograph of an Arabian oryx. Fig. 5.2 is a photograph of a norther...

2022 Spring

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

(a) Complete Table 6.1 to show the names, functions and sites of action of the three different digestive enzymes.Table 6.1| name of enzyme | function ...

2022 Spring

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

All living organisms release energy from nutrient molecules within their cells. What is the name of this characteristic?

2022 Summer

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

Which diagram shows a flower from a monocotyledon?

2022 Summer

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a cross-section through two guard cells of a leaf. Which labelled structures would also be found in an animal cell?

2022 Summer

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a cross-section through a leaf. Which label shows a tissue?

2022 Summer