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B1 Mini test B HT- Questions (25 min)
Q1. A student investigated growth responses in plants.

The student grew a bean seed in a box filled with moist soil, as shown in Diagram A. After the seed had started to grow, the box was turned onto its side and placed in a dark room, as shown in Diagram B.

(a)

Complete Diagram C to show what the root and shoot will look like three days later.

(2)

(b)

Draw a ring around the correct answer to complete the sentence. light.

The results of the investigation show that the root is sensitive to

moisture. gravity.
(1)

(c)

A hormone in the plant causes the growth responses. What is the name of this hormone? Tick ( ) one box.

Auxin

Statin

Steroid

(1)

(d)

Gardeners can use some plant hormones

Page 1as weed killers.

(i)

Give one different use of plant hormones by gardeners. ............................................................................................................... ...............................................................................................................
(1)

(ii)

Selective weed killers only kill some plants in a garden. Killing weeds in a garden reduces competition between plants. Give three factors that plants compete for. 1 ............................................................................................................ 2 ............................................................................................................ 3 ............................................................................................................
(3) (Total 8 marks)

Q2.

In-vitro fertilisation (IVF) is used to help infertile women to have babies. The table gives statistics from one clinic that gives IVF treatment. Age of women given IVF treatment Under 35 years 35 – 37 years 208 44 8 0 38 – 39 years 106 17 4 0 40 – 42 years

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