Plant Organs and Growth

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Questions and Answers

What is the primary function of roots in a plant?

To produce seeds for reproduction

To absorb energy from sunlight

To anchor and absorb water and minerals (correct)

To transport water and food to the leaves

What is the purpose of the spines in cacti?

To produce seeds for reproduction

To absorb energy from sunlight

To protect from being eaten (correct)

To transport water and food

Why do mangroves have roots pointing upwards?

To collect air for growth in muddy water (correct)

To absorb water and minerals from the soil

To make food through photosynthesis

To support the stem and leaves

What is the function of the stem in a plant?

To transport water and food, and support the leaves and flowers Signup and view all the answers

What is a characteristic of parasitic plants?

They take food and water from other plants Signup and view all the answers

What is the first step in any good experiment?

To develop a question or problem that can be solved through experimentation Signup and view all the answers

What is the primary function of leaves in a plant?

To absorb energy from sunlight and make food Signup and view all the answers

What is a testable question?

A question that can be answered by designing and carrying out an experiment Signup and view all the answers

What is the importance of checking evidence in explanations?

To test the explanation and ensure it is supported Signup and view all the answers

What did Van Helmont's evidence show about his explanation of trees being made from nutrients in soil?

It did not support his explanation Signup and view all the answers

What did Malpighi's evidence suggest about the role of leaves in plant growth?

Leaves make food for plants and send it to the roots Signup and view all the answers

What is the primary function of the vertebral column?

To support and protect the spinal cord Signup and view all the answers

What is the role of ligaments in joints?

To hold bones together and allow for flexibility Signup and view all the answers

What is the function of the skull in the human skeleton?

To protect the brain Signup and view all the answers

What is the structure of a joint that allows for flexibility?

Cartilage, synovial fluid, and ligaments Signup and view all the answers

What is the outcome if an explanation is accepted?

The evidence supports the explanation Signup and view all the answers

Study Notes

Plant Organs and Adaptations

Leaves: absorb energy from sunlight and make the plant's food through photosynthesis
Stem: transports water and food, supports leaves and flowers
Roots: hold the plant in place, absorb water and minerals from the soil
Flowers: produce seeds for plant reproduction

Adaptations of Cacti and Mangroves

Cacti: no leaves to prevent water loss, spines for protection, make food in green stem, and store water in stem
Mangroves: roots pointing upwards to collect air, enabling growth in muddy water

Adaptations of Parasitic Plants

Parasitic plants: don't need leaves, take food and water from other plants

Scientific Inquiry

How to ask a question: how, why, what
First step in any experiment: develop a question or problem that can be solved through experimentation
A testable question: one that can be answered by designing and carrying out an experiment
Importance of checking evidence: to support or reject an explanation
If explanation is rejected: suggest a different explanation, test it, and check evidence again
If explanation accepted: evidence supports the explanation

Historical Evidence

Van Helmont: 'What are trees made of?' - His explanation: nutrients from soil; Evidence: tree gained 75kg in weight, but only used 0.1kg of soil, rejects his explanation
Malpighi: 'Do leaves make the food that plants use to grow?' - Evidence: seedling stopped growing after leaves were removed, suggests leaves make nutrients
Hales: 'Plants take something out of the air' - Evidence: plant took in something from air, lowering pressure, causing water level to rise, but does not support his explanation

Human Skeleton

The role of the skeleton: helps you move, supports the body, and protects vital organs
The skull protects the brain
Vertebral column: protects and supports the spinal cord
Ribs: support and protect the heart and lung
Role of the spinal cord: connects the brain to the rest of the body through a bundle of nerves
A joint: where two bones meet, making the skeleton flexible for movement
The structure of a joint: cartilage (smooth cushion), synovial fluid (slippery liquid), ligaments (slightly flexible material), and tendon (non-flexible material)

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Description

This quiz covers the different plant organs, their functions, and how they work together to keep the plant alive. It also explores the different environments and growth patterns of various plants.