Biology 1001 Review Questions with Answers, Exams of Nursing

Download Biology 1001 Review Questions with Answers and more Exams Nursing in PDF only on Docsity!

LSUE Biology 1001 Review Questions with

Answers Graded A+

Prophase I - Correct Answer During which stage of meiosis do synapsis and crossing over occur? interphase - Correct Answer Eukaryotic cells spend most of their cell cycle in which phase physical contact of cell surface proteins between adjacent cells - Correct Answer Which of the following is probably the main factor responsible for the phenomenon of density dependent inhibition cell growth and duplication of the chromosomes - Correct Answer Which of the following occurs during interphase formation of a cell plate - Correct Answer which of the following is a feature of plant cell division that distinguishes it from animal cell division are house in a membrane enclosed nucleu - Correct Answer Eukaryotic chromosomes differ from prokaryotic chromosomes in that they in mammals, extra copies of the Y chromosomes are typically inactivated - Correct Answer Which of the following statements about nondisjunction is false asexual reproduction only - Correct Answer Strictly speaking, the phrase "like begets like" refers to homologous or non sister chromatids - Correct Answer at a chiasma, two _______ are attached to each other

An X chromosome is an autosome - Correct Answer which of the following statements is false density dependent inhibition - Correct Answer As a patch of scraped skin heals, the cells fill in the injured area but do not grow beyond that. This is an example of photographs of every couple at a high school prom - Correct Answer A karyotype is most like can reveal alterations in chromosome number - Correct Answer Karyotyping Joined together at a centromere - Correct Answer Sister chromatides are genetic recombination could not occur - Correct Answer Without crossing over one X and one Y chromosome - Correct Answer What is the normal complement of sex chromosomes in a human male chrionic villus sampling is typically performed later in the pregnancy than amniocentesis - Correct Answer Which of the following statement regarding prenatal testing is false one - Correct Answer how many sex chromosomes are in a human gamete heterozygous for the trait and able - Correct Answer A carrier of a genetic disorder who does not show symptoms is most likely to be _____ to transmit it to offspring genetics and the environment - Correct Answer The individual features of all organisms are the result of the hybrid offspring of a cross are the P1 generation - Correct Answer which of the following statements regarding cross breeding and hybridization is false

8% - Correct Answer According to scientists, about what percentage of men currently living in Central Asia may be descended from the Mongolian ruler Genghis Khan applies to all sexually reproducing organisms - Correct Answer Research since Mendel's time has established that the law of segregation of genes during gamete formation the alleles for color and vision segregate independently during gamete formation - Correct Answer Imagine that we mate two black Labrador dogs with normal vision and find that three of the puppies are like the parents, but one puppy is chocolate with normal vision and another is black with PRA (progressive retinal atrophy, a serious disease of vision). We can conclude that XX - Correct Answer The sex chromosome complement of a normal human female is Most individuals carrying a lethal dominant allele have the disorder and die before they reproduce, whereas individuals carrying a lethal recessive allele are more likely to be healthy and reproduce - Correct Answer Which of the following statements best explains why dominant alleles that cause lethal disorders are less common than recessive alleles that cause lethal disorders Incomplete dominance supports the blending hypothesis - Correct Answer Which of the following statements is false? 1/6 + 1/6 = 1/3 - Correct Answer Using a six-sided die, what is the probability of rolling either a 5 or a 6 Most human genetic diseases are treatable if caught early - Correct Answer Which of the following statements regarding genetic testing is false 0 black eyed; 1 orange eyed - Correct Answer All the offspring of a cross between a black eyed mandelien and an orange mendelien have black eyes. What is the expected phenotypic ratio of a cross between two orange eyed medneliens. anatomical or molecular homologous structures - Correct Answer What evidence is used to determine the branching sequence of an evolutionary tree?

the bottleneck effect - Correct Answer genetic drift from a disaster that drastically reduces population size is called disruptive selection - Correct Answer A rabbit population consists of animals that are either dark on top or very light on top. The color pattern is not related to sex. No rabbit shows intermediate coloration (medium darkness). This pattern might result from heritable traits that promote reproduction become more frequent in a population from on generation to the next - Correct Answer Which sentence best describes the true nature of natural selection artificial selection - Correct Answer broccoli, cabbages and brussel sprouts all descend from the same wild mustard and can still interbreed. These varieties were produced by The evolve through genetic drift and other chance processess - Correct Answer A lot of your DNA is inherited "junk": It does not code for any protein and has no known function in gene regulation. How do nucleotide sequences of "junk DNA" evolve maintain two phenotypes in a dynamic equilibrium in a population - Correct Answer Frequency-dependent selection, as seen in the case of the scale-eating fish in Lake Tanganyika, tends to mutation - Correct Answer the ultimate source of all new alleles is Wallace - Correct Answer Who developed a theory of evolution almost identical to Darwin's p2 - Correct Answer the frequency of homozygous dominant individuals in a population that is in Hardy-Weinberg equilibrium is equal to resembled species on the nearest mainland - Correct Answer Darwin found that many of the species on the Galapagos islands

2pq - Correct Answer Which of the following terms represents the frequency of heterozygotes in a population that is in Hardy-Weinberg equilibrium the cells are sparsely scattered through a nonliving matrix - Correct Answer Connective tissue is different from the other major tissue types in that adipose tissue - Correct Answer Which of the following is a type of connective tissue? blood - Correct Answer What kind of connective tissue has an extracellular liquid matrix called plasma fried egg - Correct Answer Which of the following items has a shape most like a squamous epithelial cell plasma - Correct Answer The liquid part of the blood that consist of water, salts, and dissolved proteins is known as heart muscle - Correct Answer Which of the following is an example of a tissue? The are stratified squamous epithelial cells - Correct Answer Which of the following statements about the cells of the mucous membrane lining your air tubes is false? nervous tissue - Correct Answer Which of the following tissues would likely be found in the small intestine contraction - Correct Answer The main function of muscle tissue is brain disorders - Correct Answer X-ray imaging is routinely used to check for all the following except negative feedback control - Correct Answer Most homeostasis depends on

is the maintenance of a relatively constant internal state - Correct Answer Homeostasis function - Correct Answer The connection between structure and ____ is a basic concept of biology esophagus - Correct Answer The respiratory system includes all of the following structures except the glucagon - Correct Answer Under normal conditions, blood sugar levels are controlled within a narrow range by negative feedback. Two hormones are involved in maintaining blood sugar levels at the set point (about 90 mg of glucose/100 ml of blood). When blood sugar levels rise above the set point, the hormone insulin signals the liver to absorb the excess sugar. When blood sugar levels drop below the set point, the hormone glucagon signals the liver to release its stored glucose to the bloodstream. In juvenile onset diabetes, the body doesnt produce enough insulin and insulin supplements are required. If you hadnt eaten for several hours, which hormone would be responsible for returning your glucose levels to the set point? double fertilization - Correct Answer In angiosperms, the process of ____ ensures that the endosperm will develop only in ovules containing a fertilized egg be thicker than those formed during the drought years - Correct Answer A woody plant lives through 5 years of drought, followed by 5 years of good growing conditions. The ring of xylem cells formed during the 5 good years will _________ secondary phloem, cork cambium, and cork - Correct Answer Bark consists of collenchyma cells - Correct Answer Which of the following cells provide flexible support to the growing parts of plants? tuber - Correct Answer A plant stem modified for storage of food such as starch is called increased growth of the axillary buds - Correct Answer Removing the terminal bud of a plant that shows apical dominance will cause

Cloning produces monocultures that can potentially be wiped out by a single disease

• Correct Answer Which of the following disadvantage of cloning as a propagation technique? three - Correct Answer Monocot floral parts usually occur in multiples of two-thirds as many - Correct Answer How many chromosomes are there in maize embryo cell nucleaus as compared to a maize endosperm cell nucleus? plant root hairs help to absorb carbon dioxide from the soil - Correct Answer Which of the following statements in false? lignin - Correct Answer Which of the following substances, by providing strength, allows sclerenchyma cells to provide support and play a role analogous to that of an animal's skeleton ovule - Correct Answer a seed develops from a(n) Each vein in a leaf is composed of either xylam or phloem, but not both - Correct Answer Which of the following statements is false apical meristems - Correct Answer New growth that increases stem length on a plant arises mainly from the point of leaf attachment - Correct Answer What is the node of a plant stem Many desert animals are nocturnal - Correct Answer Which of the following statements about deserts and the organisms that live there is true? insects - Correct Answer The dominant herbivores in savannas are savanna - Correct Answer A photograph of a Victorian trophy room shows the heads of 15 species of hoofed mammals, all shot within a day's walk of a single hunting camp in Africa. This camp was probably located in

The forest structure consists of distinct layers that provide many different habitats - Correct Answer Which of the following statements about tropical forests is true? in the Mediterranean regios - Correct Answer Chaparral vegetation occurs around much of the central valley of central and southern California. This biome is very similar to that found Fire is very important in some biomes - Correct Answer Which of the following statements about biomes, the major terrestrial ecosystems covering the Earth, is true? wind - Correct Answer Which of the following environmental factors usually has the greatest direct effect of an organism's rate of water loss by evaporation temperate grassland - Correct Answer In which of the following biomes would you expect to find the highest abundance of large, grazing mammals? dramatic increases in crop yields ... the evolution of pest resistance - Correct Answer The immediate results of the widespread use of pesticides and fertilizers included _______________, but long term results included _____________ nitrogen and phosphorus - Correct Answer Fertilizer runoff contains ______, which are the most important limiting factors for phytoplankton growth periodic drought and fires - Correct Answer The factor(s) that help to perpetuate temperate grasslands, such as the American prairies, and prevent them from becoming woodlands include fierce winds and frigid nights - Correct Answer Which of the following tundra features would be found at the top of the Andes mountains in Ecuador? cold, dry air moving toward the poles rises - Correct Answer Most of the world's deserts are located at latitudes where

Oak, hickory, birch, beech and maple are common trees in temperate broadleaf forests - Correct Answer Which of the following statements about temperate broadleaf forests is true? scarcity of rain on the eastern flank and adjacent lowlands compared to the western flank - Correct Answer When people speak of the "rain shadow" of the California Coast Range, they are referring to the