WORKSHEET UNIT 1 & 2 / ANSWERS

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UNIT 1 WORKSHEET I (CONSOLIDATION) A. Unicellular and prokaryotic: bacteria (Monera Kingdom) Unicellular and eukaryotic: yeast (Fungi Kingdom) Multicellular without tissues: algae (Protoctist Kingdom) and sponge (animal kingdom) Multicellular with tissues but without organs: moss (Plant Kingdom) Multicellular with organs but without systems: angiosperms (Plant Kingdom) Multicellular with systems: amphibian, arthropod, mammal (Animal Kingdom) B. A) Nutrition B) Interaction C) Reproduction D) Interaction E) Nutrition F) Interaction G) Reproduction C. Classification Unicellular living things Multicellular living things

Made of ‌ One cell Several cells

Level of organization Colony Tissues Organs Systems

WORKSHEET II (CONSOLIDATION) A. A) Prokaryotic cell. 1. Cell wall, 2. Cytoplasm, 3. DNA, 4. Plasmatic membrane, 5. Ribosome. B) Eukaryotic animal cell. 1. Nucleus, 2. Cytoplasm, 3. Mitochondrion, 4. Plasmatic membrane, 5. Ribosome, 6. Centrioles. c) Eukaryotic plant cell. 1. Cell wall, 2. Nucleus, 3. Cytoplasm, 4. Plasmatic membrane, 5. Mitochondrion, 6. Chloroplast, 7. Ribosomes. B. Cell wall Plasmatic membrane Cytoplasm Nucleus DNA Mitochondria Chloroplasts Centrioles Ribosomes

Prokaryotic X X X X

X

Animal Eukaryotic X X X X X X X

Plant Eukaryotic X X X X X X X X

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C. Organelles present in all cells: plasmatic membrane, cytoplasm, DNA and ribosomes. D. A = 2, B = 3, C = 1 WORKSHEET II (EXTENSION) A. A) Santiago Ram贸n y Cajal B) Anton Van Leeuwenhoek C) Matthias Schleiden and Theodor Schwann D) Robert Hooke B. 1. Robert Hooke observed cork cells. 2. Anton Van Leeuwenhoek observed microorganisms that live in water. 3. Matthias Schleiden and Theodor Schwann defined the cell theory. 4. Santiago Ram贸n y Cajal, studied neurons and the nervous system.

UNIT 2 WORKSHEET I (CONSOLIDATION) A. 1. Respiration 2. Excretion 3. Heterotrophic 4. Open circulatory system B. 1 = F, 2 = T, 3 = F, 4 = T. WORKSHEET II (CONSOLIDATION) A) Mitochondrion and chloroplast B) 1. Water and mineral salts, 2. Carbon dioxide, 3. Solar energy, 4. Carbohydrates, 5. Oxygen, 6. Carbohydrates, 7. Carbon dioxide, 8. Oxygen, 9. Energy C) Matter and energy. WORKSHEET III (CONSOLIDATION) A. 1 = a, 2 = c, 3 = b, 4 = d B. A) Plants release oxygen from photosynthesis, CO2 from respiration and excess water, (as vapour) through the stomata. B) The transportation of substances in the plant takes place through the vessels which run along the stem, the branches and the veins of the leaves. C) The carbohydrates (organic nutrients) which are made in photosynthesis are mixed with waterin the leaf and form the phloem sap. 2


WORKSHEET IV (CONSOLIDATION) A. Animal

Without a Digestive System

Anchovy (anchoa) Slug (babosa) Sponge (esponja) Rabbit (conejo) Garsshopper (saltamontes) Jellyfish (medusa) Elephant (elefante) Frog (rana) Tapeworm (tenia)

With a Gastrovascular cavity

With Digestive tract X X

X X X X X X X

B. 1. Mounth 2. Oesophgus 3. Stomach 4. Intestine 5. Liver 6. Anus WORKSHEET V (CONSOLIDATION) A. Fish: breathing through gills. Mosquito: breathing through tracheae. Parrot: breathing through lungs. Earthworm: breathing through skin. B. Animals which live in water or in a very wet environments

Have a very thing skin

Gills

Are groups of filaments

Tracheae

Are very thin tubes

Lungs

Are two spongy organs

Which allows dissolved oxygen to be absorbed Which fluids circulate through Which open up to the outside through spiracles Made up of millions of minute cavities called alveoli

WORKSHEET VI (CONSOLIDATION) A. A) Sponges and cnidaria do not need to have any parts of their bodies specialized in transportation; almost all their cells are in contact with the environment (water) and they exchanges substances directly with the outside world. 3


B) In closed circulatory systems the circulating liquid flows inside the vessels. The exchange of substances takes place through the thin walls of the thinnest vessels.

B. Open circulatory system Crab (cangrejo) Fly (mosca)

Closed circulatory system Earthworm (lombriz de tierra) Snake (serpiente) Horse (caballo) Octopus (pulpo)

WORKSHEET VII (EXTENSION) A. The digestive system of birds has a crop which moistens and softens the food. In our digestive system that function is carried out by glands. We crush food with our teeth, but birds crush food with their gizzard. Birds have a cloaca to eliminate waste, but humans have an anus. B. Birds feed their young with food that they carry in their crop. When the food is soft and moist they regurgitate it.

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