Why did dna technology lead to more use of cladistics?a. it showed that the linnaean system was the most accurate.b. it changed ideas about which animals were closely related.c. it proved that eukaryotes formed from endosymbiosis.d. it showed that there are three domains and six kingdoms?
Which statement best describes the organelles in a cell? (1) All organelles are involved directly with communication between cells. (2) Organelles must work together and their activities must be coordinated. (3) Organelles function only when there is a disruption in homeostasis. (4) Each organelle must function independently of the others in order to maintain homeostasis.
Chlorofluorocarbons may be harming the ozone layer by ____. a. adding more ozone molecules c. destroying ozone molecules b. blocking ultraviolet radiation d. adding carbon dioxide molecules
The appearance of fireflies at dusk is an example of a circadian rhythm because it a. is related to the phase of the moon b. is related to the temperature of the air c. happens daily d. happens seasonally
If the surface area of a cell that is shaped like a cube increases 100 times, its volume increases about
Which adaptation makes bipedalism possible? A.opposable digits B.large brain C.foramen magnum in back of skull D.elvis rotated inward
Matter can recycle through the biosphere because: A) matter is passed out of the body as waste. B) matter is assembled into chemical compounds. C) biological systems do not use up matter, they transform it. D) biological systems use only carbon, oxygen, hydrogen and nitrogen
What is true about dissimilar organisms such as a cow and a yeast? A. They are not related at all. B. Their degree of relatedness cannot be evaluated. C. Their degree of relatedness can be estimated from their genes. D. They can interbreed and thus are the same species.
When the body receives stimuli, which structure typically processes the stimuli? sensory nerve cell motor nerve cell brain meninges
Which of the following accurately describes fermentation? A. Fermentation always produces carbon dioxide. B. Fermentation can only occur in the presence of oxygen. C. Fermentation generates more ATP than cellular respiration. D. Fermentation makes NAD+ needed to keep glycolysis going.
Common law refers to laws determined through A due process. B precedent. C the rule of law. D the separation of powers.
The longest subdivision in geologic time is a(n) ____. a. epoch c. century b. period d. eon Please select the best answer from the choices provided
The bureau of land management manages over _____ acres of land in the united states 260 Million 100 Million 875 Million
Plants are unique because they have _____, which absorb light energy from the Sun. a. plastids b. vacuoles c. chloroplasts d. mitochondria
Which of the following accurately describes the life cycle of most gymnosperms? a. Seed cones contain ovules. b. Germinated seeds are haploid. c. A pollen tube is used to prevent the fertilization process. d. Pollen grains undergo meiosis to form egg cells.
How does the anaphase stage differ in the two phases of meiosis?. . Select one of the options below as your answer:. . . . A.. Anaphase I separates sister chromatids and anaphase II separates homologous chromosomes into daughter cells.. . . . . B.. Anaphase I has homologous chromosomes attached to spindle fibres and anaphase II involves separation of these homologous chromosomes.. . . . . C.. Anaphase I separates homologous chromosomes and anaphase II separates sister chromatids into daughter cells.
Why do some plants in the tundra retain their dead leaves instead of shedding them? a. The plants absorb the nutrients in the dead leaves. b. The dead leaves insulate new buds from the cold. c. The dead leaves protect them from predatory insects. d. The dead leaves help them survive long periods of drought.
A patient is in need of hydration. Which type of solution are the patient’s cells most likely in? hypotonic hypertonic isotonic osmotic
Permafrost and mosses, lichens, and wildflowers are common in the a. tundra climate. b. subtropical climate. c. temperate climate. d. ice cap climate.
After a fetus has developed for only three months, what is the skeleton made of? A. Muscle B. Bone C. Cartlage D. Tendon (I think it's A)
Wind blowing sediment against rock or land area, or sandblasting is called a. abrasion c. deflation b. deposits d. picking up