What are unicellular animals with chloroplasts


  1. Solve exercise 2 on p.119 and exercise 1 on p.120
    Body part: Task:
    Rope Ladder Nervous System Management and processing of information
    Intestinal digestion
    Excretory organ release of fluids
    closed blood vessel transport system
    Nerve nodes at the head end (brain) process the incoming information
    Cutaneous muscle tube locomotion
    Bristles anchoring, locomotion
  1. Now fill in the blanks about the earthworm's locomotion.
    To move forward, the sphincters contract in some segments, making the rings thinner and longer. Since the diagonally backwardsTo prevent the straightened bristles from slipping back, the part of the worm in front of it is pushed forward. If the longitudinal muscles then contract in these elongated segments, they become thicker and shorter again. Again the bristles prevent slipping back and the rest of the body is pulled forward
  2. Solve exercise 3 on page 120.
    Hermaphrodites, possess both male and female genital organs.
  3. Solve exercise 5 on page 123 earthworms over the course of the year
  1. In the spring the earthworms become active again and come to the upper layers of the earth.
  2. In summer the earthworms dig many tunnels in the ground, they eat organic material and fertilize the soil with their solution (excrement).
  3. In autumn the earthworms migrate to deeper layers of the earth
  4. In order to then enter a period of rest in winter, in which they curled up and survive the cold season.
  1. Earthworm fact sheet
    Please keep the profile tidily, it will be collected and graded later!


Biology - solutions for the week 04/20 - 04/24/2020

2.6.4. bacteria

  1. Compare the structure of a bacterial cell with that of an animal cell and a plant cell (tip: What are the similarities and how do the bacterial cells differ?).
    Bacterial cells are neither plant nor animal cells.
    Like plant and animal cells, they have a cell membrane, cytoplasm and flagella for locomotion. In addition, like plant cells, they have a cell wall and some bacteria also have chloroplasts.
    But bacterial cells differ from plant and animal cells in the following structures: they do not have a real cell nucleus, i.e. the core substance is separated by a membrane, but is freely present in the cell plasma. In addition, bacteria are also equipped with a mucous membrane and they can encapsulate themselves under poor living conditions and survive for a long time.
  1. Name three diseases that are caused by bacteria (see p.107). What great scientists discovered these diseases?
    Anthrax, cholera and tuberculosis were discovered by Robert Koch.
    Diphtheria was created by Emil von Behring.
  2. Solve exercise 1 on page 109
    Cells of the oral mucosa (a) and the intestinal wall (d) do not have a cell wall. They are both animal cells and they do not have a cell wall.
    Root cells (b), on the other hand, have a cell wall, because all plant cells are equipped with a cell wall. In addition to the plant cells, bacteria / bacterial cells (c) also have a cell wall.
  3. “2.6 Single-celled living beings
    According to their structure and their peculiarities, protozoa can be divided into different groups:
    Animal protozoa. Plant protozoa bacteria

e.g. e.g. e.g. "

Paramecium Chlorella Cocci spirils

Tubercle bacteria

Diphtheria bacteria

12. Test yourself on page 110 by solving the multiple choice questions.


2 B







Solutions for the week from 6th to 9th April

2.6. Single-celled living beings

to 2.

"According to their structure and their characteristics, single-cell organisms can be divided into different groups:

Animal protozoa. Plant protozoa bacteria

e.g. e.g. e.g. "

Paramecium Chlorella (here we wear later

amoeba an example a)


to 3.

Paramecia, eye animals (also called euglena), eyelash balls (also called volvox), bell animals, sun animals, rotifers and amoebas (also called change animals).

to 12.

The green alga Chlorella is a plant creature because it has chloroplasts and photosynthesis. Chlorella therefore feeds autotrophically.

Paramecium and amoeba do not have chloroplasts and feed on a heterotrophic diet and are therefore unicellular animals.

to 14.

  • Chlorella can cause infectious diseases in humans - not correct
  • humans eat autotrophically - not correct
  • Amoebas move through eyelashes - not correct
  • Amoebas can cause diarrhea in humans - correct
  • plant protozoa feed on autotrophic correct
  • Paramecia are visible to the naked eye as tiny dots in the water droplets - correct


Solutions for the week 03/30 - 3.4.

Biology - solutions for the week March 30th - April 3rd, 2020


    1. Metabolic processes in cells

6 b) What is the word equation for photosynthesis?

  • Carbon dioxide + water à oxygen + sugar
  • Carbon dioxide and water are converted into oxygen and sugar.
  • During this conversion, the light energy of the sun is used.

7. Where does photosynthesis take place (in which cell organelle)?

  • In the chloroplasts that contain the green leaf pigment chlorophyll.

Where does breathing take place (in which cell organelle)?

  • In a mitochondrion or in the mitochondria.
  1. Solve on p.99 exercise 5. Little tip, the priest Joseph Priestley carried out an experiment with a mouse that is explained in the second video (see 2b above).
  • green plants use carbon dioxide, water and light energy to produce glucose for their diet.
  • Plants excrete oxygen every day as a by-product of this reaction
  • Animals like humans need this oxygen to breathe and survive
  • Animal organisms, in turn, exhale carbon dioxide as a waste product from breathing
  • Plants need this carbon dioxide to survive
  • that is, the plants and animals need each other
  • therefore the plants are vital to the animals, but the animals are also vital to the plants


2.5. Cell division and growth

  1. Solve problem 2 on p. 95.
  • presumably the person in the pictures fell and was injured
  • You can see a graze on the forearm, the skin tissue is injured and many skin cells have been destroyed
  • The pictures show that the wound heals over a certain period of time
  • During the healing process, the cells divide, increase in volume through plasma growth and differentiate into skin cells
  • this process continues until the injured skin tissue has completely regenerated

Solutions for the week of 23-27.3.


1. Solve on p.91 problem 2.

autotrophic diet:

The root cell of a birch, the cell of a leaf, the cell of a red strawberry, the cell of an onion scale

heterotrophic diet:

Hare muscle cell, human skin cell, shark liver cell


Plant cells feed autotrophically. Low-energy inorganic substances are absorbed and converted into the body's own high-energy organic substances. In the course of photosynthesis, the inorganic substances carbon dioxide, water and minerals are converted into water and the energy-rich organic grape sugar.

Animal cells feed heterotrophically. They absorb energy-rich organic substances such as fats and carbohydrates.



2. Solve on page 99 problem 1


a) Animal cells and plant cells differ in some cell components. All cells consist of a cell membrane, nucleus, cytoplasm and mitochondrion. Plant cells also have chloroplasts, vacuoles and a cell wall.

b) Cell A is a plant cell because it also has vacuoles, chloroplasts and a cell wall. Cell B is an animal cell because it has no vacuoles, chloroplasts or a cell wall.

c) Cell A feeds autotrophically. Cell B feeds heterotrophically.