Cambridge 1.3 Features of organisms mcq

The diagram shows an arthropod. To which group does it belong?

• A. arachnids

• B. crustaceans

• C. insects

• D. myriapods

Answer explanation

IGCSE BIOLOGY 2019//Paper2_2/Q3

pedipalp不是leg，它的功能之一是繁殖reproduction。所以这个节肢动物arthropod是只有8条腿（4对）。4对腿的只能是arachnids蛛形纲。

The table shows the number of animals collected in a sample from a woodland and the groups to which they belong. How many arthropods in total, in this sample, have six or eight legs?

• A. 15

• B. 88

• C. 90

• D. 98

Answer explanation

IGCSE BIOLOGY 2019//Paper2_1/Q3

表格中的四种生物都属于arthropod节肢动物（腿是jointed leg)。

6条腿（3对/three pairs) 是insect昆虫。80

8条腿（4对/four pairs)是arachnid蛛形纲。10

80+10=90

The diagrams show four organisms not drawn to the same scale.

Which organism is a prokaryote?

• A

• B

• C

• D

Answer explanation

IGCSE BIOLOGY 2018//Paper2_3/Q2

A是 bacteria细菌（capusle + cell wall + cell membrane + falgellum)，B，C，D都有细胞核，所以它们都不是prokaryote原核生物。

Lichens are formed from two different organisms living together. The table shows some of the characteristics of two organisms, X and Y, found in most lichens. Which kingdoms are represented by X and Y?

• A. X: Fungus，Y: Plant

• B. X: Fungus, Y: Protoctist

• C. X: Protoctist, Y: Fungus

• D. X: Protoctist, Y: plant

Answer explanation

IGCSE BIOLOGY 2018//Paper2_2/Q2

只有Fungus真菌才有hyphae菌丝。真菌有细胞壁cell wall。

Protoctist原生生物绝大部分是单细胞生物。

What is a characteristic of both insects and arachnids?

• A. eight legs

• B. exoskeleton

• C. three pairs of legs

• D. wings

Answer explanation

All arthropods have a hard exoskeleton made of chitin 英 /'kaɪtɪn/几丁质, a type of protein.

What kind of skin do amphibians have?

• A. dry without scales

• B. dry with scales

• C. moist without scales

• D. moist with scales

Answer explanation

IGCSE BIOLOGY 2018//Paper2_3/Q3

幼体在水里生活。两栖动物amphibian皮肤潮湿moist，且没有scale鳞片。

With which kingdoms do bacteria share the same genetic code?

• A. animal, plant, fungus and protoctist

• B. animal, plant and fungus only

• C. animal and plant only

• D. animal only

Answer explanation

IGCSE BIOLOGY 2017//Paper2_3/Q38

living organisms不论是prokaryotes（原核生物）还是eukaryotes (真核生物）。它们的遗传物质都是DNA。

To which group do both the organisms shown in the diagram belong?

• A. dicotyledons

• B. ferns

• C. fungi

• D. monocotyledons

Answer explanation

IGCSE BIOLOGY 2017//Paper2_2/Q1

frond: 蕨类等的叶，复叶

叶子底部有spores孢子。

Each of the diagrams shows an area of cytoplasm.

Which is from a prokaryote?

• 
• 
• 
• 

Answer explanation

IGCSE BIOLOGY 2017//Paper2_1/Q3

细菌没有membrane bound organelle（膜包围的细胞器，例如叶绿体chloroplast, 细胞核nucleus, 内质网ER, 线粒体mitochondria）。

细菌的细胞器只有ribosome核糖体，合成蛋白质。

细菌的DNA像一团毛线一样聚集在细胞中央。且可能有flagellum鞭毛（也可能没有），帮助游动。

The drawing shows a ground squirrel.

Which feature identifies this animal as a mammal?

• A. eye

• B. four limbs

• C. fur

• D. tail

Answer explanation

IGCSE BIOLOGY 2017//Paper2_2/Q1

Mammal哺乳动物的特征是hair or fur，warm-blooded animals，show presence of mammary glands to nurse young ones。

Mammals have external ears 外耳 or pinnae but one of the mammals has no pinna which is Echidna。