Body Systems
Which of the following is not a system of the body?
a: muscular system
b: nervous system
c: worried system
d: digestive system
worried system
What does the word endangered mean?
in danger of no longer existing
Which part of the plant is most helpful for absorbing water?
roots
What type of medicine uses a small amount of a virus to help people become immune to a disease?
vaccine
Scientists who study heredity have learned that DNA is located in ____.
a: Playing cards
b: Cell chromosomes
c: Non-living things
d: Computers
cell chromosomes
Body parts made of tissues that can contract and then relax back to normal size
muscles
Which of the following is not a characteristic of a mammal?
a: cold-blooded
b: a heart with four chambers
c: backbones and neck-bones
d: body hair
Mammals are NOT cold-blooded
Hummingbirds’ wings move quickly, allowing them to hover over flowers in order to get ___________.
nectar
Which of the following is an aerobic exercise that will help improve cardiovascular fitness?
a: Lifting weights
b: Stretching
c: Eating a balanced diet
d: Running
running
If you were a crime scene investigator you might use a sample of an unknown criminal’s DNA. How would the DNA help your investigation?
The DNA of every person is unique, just like his or her fingerprints. Once I have the criminal’s DNA, I can match it if I have an existing sample. Then, I discover whom it belongs to, so it identifies the criminal.
Body system packed neatly between your head and your hips (more than 25 feet long)
Digestive System
What is the offspring of two different species?
animal hybrid
Plants (and animals) living in a rain forest must be adapted to what kind of climate?
lots of water (rain)
An inherited _____ is one that is genetically determined. They are passed from parent to offspring.
An acquired ______ is the character developed in an individual as a result of environmental influence.
trait
The heart, which pumps blood through the body, is made up of this kind of tissue
muscle tissue
Which of the following is NOT a way that microorganisms change their environment?
a: cause disease or illness
b: leave fossils for scientists to study
c: feed on dead organisms
d: provide food for other animals
Microorganisms do NOT:
leave fossils for scientists to study
Dr. Mario Molina is a scientist from Mexico who discovered that chemicals from aerosol sprays were harming the ___________.
atmosphere
Which body systems work together?
All body systems work together
What helps animals stay alive? Give one example of something that humans have that protect them.
Built-in systems help us stay alive. Humans have eyelashes to protect their eyes from dirt, skin to protect their body from harm, etc.
What is one of the main reasons many plants (and animals) are endangered?
deforestation