Lauren Regents Prep

1) amino acids

there are over 2000 kinds of edible insects in the world, and they are becoming an increasingly popular source of protein. One cup of cricket flour contains 28g of protein. The building blocks of the protein in cricket flour are... 1) amino acids 2) water 3) simple sugars 4) carbohydrates

1) sexual reproduction

two kittens in a litter are genetically different from each other and from their parents. These differences are most directly due to 1) sexual reproduction 2) asexual reproduction 3) cloning 4) evolution

1) Dodder plants are parasitic, relying on host organisms for resources

Dodder plants consist of tangled masses of yellow, leafless vines and contain few chloroplasts. The vines twist around and grow into the stems of other plants and absorb water and nutrients from them. Which statement best describes this relationship? 1) Dodder plants are parasitic, relying on host organisms for resources 2) Dodder plants are decomposers, returning organic materials back to the environment 3) Dodder plants are producers, while the other plants they attach to are consumers 4) Dodder plants are consumers, transferring energy to other plants in the ecosystem.

4) a decision where benefits and risks have to be weighed

Orcas are endangered whales. Only about 80 individuals remain off the coast of Washington State. Salmon are a source of food for orcas. Some individuals are proposing that four dams in washington state be removed so that habitat areas for salmon increased. Those opposed to the dam removals say that the dams provide low-cost hydroelectric power and positively influence the local economy. This situation is an example of... 1) direct harvesting of an endangered orca species by humans 2) orcas overproducing in an ecosystem with no resources 3) a community relying on nonrenewable energy sources 4) a decision where benefits and risks have to be weighed

4) oxygen

Organisms that live on land rarely compete for... 1) food 2) space 3) water 4) oxygen

4) crabs and crayfish

The diagram below represents a food web in a pond ecosystem (part A question 8) The two carnivores in the food web are... 1) bass and small invertebrates 2) small invertebrates and crabs 3) water plants and clams 4) crabs and crayfish

4) the flow of materials in a forest community

This diagram best represents... Part A Question 5 1) the recycling of energy in a forest community 2) ecological succession after climatic changes 3) competition of limited resources in a population 4) the environment can influence the expression of genes

2) genes, located on chromosomes, found in the nucleus

Traits are passed from parents to offspring. These traits are determined by... 1) chromosomes, located on genes, found in the nucleus 2) genes, located on chromosomes, found in the nucleus 3) chromosomes, located on genes, found in the ribosomes 4) genes, located on chromosomes, found in the ribosomes

2) the evolution of a species can result from changes in reproductive cells, not body cells

a genetic change that occurs in a body cell of a mouse will not contribute to the evolution of the species because... 1) body cell mutations will cause the cell to die before it reproduces 2) the evolution of a species can result from changes in reproductive cells, not body cells 3) random changes are repaired by enzymes before they are passed to offspring 4) the evolution of a species is caused by natural selection, not genetic variation

1) maintain homeostasis

a small lizard spends the morning hours lying in the sunlight until its body temperature rises. Later on in the day, the lizard rests in a shady area until its body cools. This type of behavior is important to... 1) maintain homeostasis 2) detect variations 3) attract mates 4) obtain nutrients

2) the body's immune system overreacting to a usually harmless substance

doctors often use certain medications to treat infections. a few people have a reaction to some of these medications such as itching, swelling, or trouble breathing. This is an example of... 1) using antibodies to cure a medical problem 2) the body's immune system overreacting to a usually harmless substance 3) the body creating a mutation to fight unknown pathogens 4) a vaccine causing the body to produce antigens against the infection

4) can result in a new variety of gene combinations in the species

gene mutations can be caused by many things. These mutations are biologically important because they... 1) occur at a regular rate and therefore can be controlled 2) can be passed to the offspring if they occur in any cell of the body 3) are always harmful and therefore help to eliminate weak traits 4) can result in a new variety of gene combinations in the species

4) the environment can influence the expression of genes

identical twins were separated at birth and raised by two different families. Years later, one twin was a physically fit member of the cross-country team, and the other twin was overweight with slightly higher-than normal blood pressure. The differences in these twins could be explained by the fact that... 1) the genes in the two individuals are completely different 2) in twins, each individuals inherits genes from only one parent 3) the DNA bases in twins combine differently 4) the environment can influence the expression of genes

3) mitochondrion

in which cell structure is energy extracted from? 1) chloroplast 2) ribosome 3) mitochondrion 4) vacuole

1) preserving biodiversity

maintaining a rich variety of genetic material that may lead to discoveries useful to humans can be ensured by... 1) preserving biodiversity 2) increasing cloning 3) asexual reproduction 4) selective breeding

2) recycle nutrients, making them available for other organisms

many bacteria and fungi are important in the environment because they... 1) return energy to the environment, making it available for plants. 2) recycle nutrients, making them available for other organisms 3) produce glucose through the process of respiration 4) reverse the flow of energy in the ecosystem

3) nuclei and ribosomes

protein synthesis is accomplished primarily by what two cell structures? 1) vacuoles and mitochondria 2) ribosomes and vacuoles 3) nuclei and ribosomes 4) nuclei and mitochondria

4) the environment that they lived in remained the same, and they were well adapted to it.

scientists who have examined the fossil record have noted that some species have changed very little over long periods of geologic time. The lack of change in such organisms is most likely because... 1) all members of their population were genetically identical, and they lived in a rapidly changing environment 2) there was a large amount of variation in their population, and the environment changed frequently 3) they could move between different environments when food supplies became scarce 4) the environment that they lived in remained the same, and they were well adapted to it.

4) sequence of the bases A, T, C, and G

sexually reproducing organisms pass on their genetic information as a... 1) long chain of amino acids 2) complex series of inorganic proteins 3) sequence of complex sugars 4) sequence of the bases A, T, C, and G

2) cell membrane

some viruses attack cells by attaching to their outer covering, entering, and taking over their genetic machinery. Viruses are able to invade cells after first attaching to their... 1) nuclear membrane 2) cell membrane 3) genetic machinery 4) viral proteins

2) temperature of the water, dissolved oxygen in water, dissolved minerals in water

which list contains only abiotic conditions that might be found in a pond ecosystem? 1) temperature of the water, green plant populations, dissolved minerals in water 2) temperature of the water, dissolved oxygen in water, dissolved minerals in water 3) bacteria, dissolved minerals in water, temperature of the water 4) dissolved oxygen in water, fish populations, insect populations