Find study materials for any course. Check these out:
Browse by school
Make your own
To login with Google, please enable popups
To login with Google, please enable popups
Don’t have an account?
To signup with Google, please enable popups
To signup with Google, please enable popups
Sign up withor
Living things inherit information from their parents encoded in:
Tissues are grouped together in functional units called:
Which of the following atoms is the most stable?
Helium, atomic number 2
(because it has 2 electrons, filling its outer shell)
An organ is to an organism as ______ is to a molecule.
What is the fundamental component of an element?
Arrange the following levels of organization in living things, going from least inclusive to most inclusive:
A type of covalent bond in which electrons are shared equally between atoms, resulting in NO positive or negative side of the molecule, is termed __________.
a non-polar covalent bond
one atom shares an electron with another atom
The primary reason that atoms form chemical bonds is so they can ______.
Oil will NOT mix with water and is _______, whereas salt will readily associate with water and is _________.
Glucose is considered an organic molecule because it contains ______.
What feature allows carbon to form four covalent bonds?
Chemicals that are identical in formula but differ in structure are known as ______.
If you isolate a fatty acid with one double bond, you know the fatty acid is ________.
What type of bond holds the two chains of nucleotides together in DNA?
All cells arise from ______.
A multicelled organism must be made from _______.
What is the cytoplasm?
A defect in the ribosome would affect the ability of the cell to _________.
Which of the following are functions of the smooth ER?
It removes toxic compounds, stores fat, and produces steroids.
What is the function of the lysosome?
to break down cellular components and intruders
What do chloroplasts and mitochondria have in common?
They are both descended from bacteria.
A gap junction and a plasmodesma are similar in that they both____________.
allow neighboring cells to communicate
What is the fundamental source of energy for most organisms on Earth?
Which of the following is the best definition of energy?
the capacity to bring about movement against an opposing force
What happens when a phosphate group is bonded to ADP?
The enzyme lactase _________.
In an enzyme, the region that catalyzes a reaction is known as the_______.
The regulation of an enzyme's activity by means of a molecule binding to a site on the enzyme other than its active site is called __________.
When a molecule gains electrons, it has been ______. When a molecule loses electrons, it has been ______.
Electrons stripped from glucose during glycolysis and the Krebs cycle are transported to the electron transport chain by ______.
The process of photosynthesis can be summarized and written as the following chemical equation: 6 CO2 + 6 H2O → C6H12O6 + 6 O2 How is this equation similar to the reactions of cellular respiration?
it is the reverse of the cellular respiration equation.
Which of the following solar wavelengths would you expect to be LEAST used by plants for photosynthesis?
The thousands of pores lining a leaf that allow for gas exchange in plants are known as __________.
Light hits photosystem II, causing electrons to be excited to a high energy level. These electrons are picked up by an electron acceptor and passed through an electron transport chain, where _____________ can be made.
the production of ATP from ADP and phosphate
What is the relationship between the sequence of bases on a molecule of DNA and the proteins in a given cell?
The bases on DNA are the code to produce proteins.
In what form does the DNA in your cells exist?
as a dense package of DNA and protein called chromosomes
Plant cell mitosis is basically like animal cell mitosis EXCEPT that _________
plant cells use a cell plate to separate daughter cells
Which of the following statements about the products of a single cell that has gone through meiosis is true?
the swapping of DNA between homologous chromosomes
A couple has had three children, all of whom are boys. When the woman becomes pregnant a fourth time, they are hopeful that this one is a girl. What is the chance that this child will be a girl?
Which of the following was a key aspect of Mendel's method that set him apart from other experimenters?
What is an allele?
In the individual with genotype AaBB, what percentage of gametes will contain the B allele?
A plant with orange flowers is crossed with another plant with orange flowers. The offspring show the phenotypic ratio of 1:2:1—one red flower:two orange flowers:one yellow flower. These plants are displaying a classic example of ______.
If some individuals with a particular condition all have a specific allele, and other individuals with that same allele did not necessarily develop that condition, what is the best explanation?
the condition is influenced by an environmental factor as well as the allele.
What fundamental discovery in 1953 by James Watson and Francis Crick changed the way we view genes?
The "loose" bonding of two strands of DNA by hydrogen bonds allows them to _________.
When DNA is copied, what is the arrangement of new and old strands?
Each older strand is paired with a new, complementary strand.
During DNA replication, one template has the base sequence AACTGGCTA. What would be the sequence on the complementary strand?
If a particular gene has 23 percent cytosine, how much thymine does it contain?
If an error in base pairing becomes incorporated in the next round of replication, what is the result?
What does the principle of common descent imply about humans?
Humans are descended from ancestors shared by all other living organisms.
What conclusion did George Cuvier come to after his inspection of the fossil record?
Charles Darwin is given the credit for formulating the idea of evolution through natural selection. However, another naturalist came up with the same insight at approximately the same time as Darwin. Who was it?
Alfred Russell Wallace
What was one of the reasons that the principle of natural selection was slow to catch on?
Nobody understood how traits could be reliably passed on through generations.
Of the following structures, which is homologous to the wing of a bat?
What did Stanley Miller's experiments in the 1950s demonstrate?
It was possible to make the building blocks of living molecules from the conditions on early Earth.
A compound made of only nucleic acids that is capable of carrying out enzymatic reactions is known as a _____.
Why were photosynthetic bacteria critical for creating life as we know it?
They produced much of the atmospheric oxygen
Which of the following problems did plants have to overcome during the plant invasion of land?
Reproduction in dry areas, gravity’s effects, and water retention
Which of these represent the four types of tissue?
epithelial, muscle, connective, nervous
In which layer of skin do touch receptors reside?
Damage to the axial skeleton could indicate damage to what part of your skeleton?
Myosin heads bind to and walk along actin filaments.
You must constantly add new blood cells to your system to maintain it. Why is this?
They lack many organelles and have a short life span.
Blood is brought to tissues by _____, where it can exchange materials in ________ before returning to the heart in _______.
Soluble materials move into and out of capillaries mostly through _______, whereas water moves mostly through ________.
diffusion; pressure and osmosis
Which of the following is NOT a function of our respiratory system?
to provide nutrients to the blood
Most nutrients absorbed in the intestine go directly to the _____.
If the process of peristalsis were disrupted, what would the immediate impact be?
Material would cease to move through the digestive system.
The duodenum is distinct from the rest of the small intestine not only because of its location but also because ______.
it receives digestive juices from several organs
The Calorie is ______
Which of the following does NOT provide a significant number of calories?
During cleavage, cells_________.
What will the tube that is formed during gastrulation eventually become?
In vertebrates such as the frog, the neural tube develops in the ______ portion of the embryo.
If you removed the capacity for cells to selectively adhere to others, what aspect of development will you likely disrupt?
In human females, oocytes ______.
mature approximately every 28 days before being transported to the uterine tube
Precursor cells that develop into an egg are ______.
Sperm begin to develop in the ______, mature in the ______, and leave through the _____.
What would happen to a sperm without an acrosome?
It would be unable to penetrate accessory cells around the oocyte.
How are nutrients delivered to the developing fetus?
The mother's blood supply and the baby's blood supply exchange material in the placenta.
Sign up for free and study better.
Get started today!