Cells & Body Systems
This cell structure controls what enters and leaves the cell.
What is the cell membrane?
Sunflower plants use sunlight, water, and carbon dioxide to make glucose during this process.
What is photosynthesis?
An organism such as duckweed makes its own food and is classified as this.
What is a producer?
Flower color, seed shape, and leaf size are inherited characteristics called these.
What are traits?
A thick waxy covering helps a cactus reduce water loss in a dry environment. This helpful structure is called this.
What is an adaptation?
This cell structure contains most of the genetic material that controls the cell’s activities.
What is the nucleus?
Yeast cells break down sugar to release usable energy during this process.
What is cellular respiration?
A caterpillar eats leaves. Based on how it obtains food, the caterpillar is this type of consumer.
What is an herbivore?
In DNA, adenine, or A, pairs with this base.
What is thymine, or T?
Preserved footprints, shells, bones, or impressions in rock are examples of this evidence of past life.
What are fossils?
This organelle performs cellular respiration and releases energy from glucose.
What is the mitochondria?
In the food chain: clover → grasshopper → lizard → snake, the arrows show the direction that this moves.
What is energy?
A clownfish lives among the tentacles of a sea anemone. The clownfish gains protection, and the sea anemone is not harmed. This relationship is most likely this.
What is commensalism?
In pea plants, purple flowers are dominant, represented by P. White flowers are recessive, represented by p. A cross of PP × pp would produce offspring with this genotype.
What is Pp?
In a population of beetles, green beetles are easier for birds to see on brown soil. Over time, brown beetles become more common. This process is called this.
What is natural selection?
This plant structure absorbs water and minerals from the soil.
What are roots?
In an energy pyramid, much of the energy at each level is released to the environment in this form.
What is heat?
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A forest ecosystem has 18 species and 60 individuals. The biodiversity index is calculated as species divided by individuals.
What is 0.3?
A DNA sequence changes from A-T-C-G to A-T-T-G. This change in genetic material is called this.
What is a mutation?
In undisturbed rock layers, a fossil found in a lower rock layer is usually this compared to a fossil found in a rock layer above it.
What is older?
Place these levels of organization in order from least complex to most complex: organ, cell, organ system, tissue.
What is cell → tissue → organ → organ system?
This process uses carbon dioxide and water to make glucose, while cellular respiration uses glucose to release energy.
What is photosynthesis?
In a food web, ladybugs and lacewings both eat aphids. This means ladybugs and lacewings are involved in this interaction.
What is competition?
Sexual reproduction usually produces more genetic variation than asexual reproduction because offspring receive genetic information from this.
What are two parents?
A population of moths includes light-colored and dark-colored moths. After tree bark becomes darker, dark-colored moths survive and reproduce more often. Over many generations, the population will most likely have more of these moths.
What are dark-colored moths?