General Biology

In central Africa, the frequency of the sickle-cell allele has remained stable over the years ...

In central Africa, the frequency of the sickle-cell allele has remained stable over the years ...

In central Africa, the frequency of the sickle-cell allele has remained stable over the years because the allele protects against malaria. In the United States, malaria was eradicated by eliminating the mosquito that spreads the disease. The decreasi

Guido   80   1 Reply

kont24

In certain areas of the world where there's a high incidence of malaria, there's also a high ...

In certain areas of the world where there's a high incidence of malaria, there's also a high ...

In certain areas of the world where there's a high incidence of malaria, there's also a high incidence of sickle-cell anemia. Sickle-cell anemia results from a mutation in the gene that codes for hemoglobin. Malaria is an infectious disease

purpleberry   92   2 Replies

purpleberry

in certain flowers, is inherited by alleles that shows lack of dominance

in certain flowers, is inherited by alleles that shows lack of dominance

In such of flowers, a cross between a homozygous red flower and homozygous white flower always result in a pink flower. Across is made between two pink flowers. What is the probability of each of the colors (red, pink and white)appearing in the offsp

Vilma57   965   1 Reply

awol21

In characterizing cartilage, which one of the following is CORRECT?

In characterizing cartilage, which one of the following is CORRECT?

In characterizing cartilage, which one of the following is CORRECT?
A) Cartilage is found where support under pressure is required.
B) All types of cartilage are produced by osteocytes.
C) Cartilage functions to link muscles to bone.
D) Cartilage

OkeyDokey   24   2 Replies

OkeyDokey

In chelicerates, the abdomen and telson are fused (True or false?)

In chelicerates, the abdomen and telson are fused (True or false?)

In chelicerates, the abdomen and telson are fused.
 
  Indicate whether the statement is true or false

wyatt7799   30   1 Reply

berger58

In chemical bonding, when the bonded atoms share electrons, it is specifically called ________.

In chemical bonding, when the bonded atoms share electrons, it is specifically called ________.

In chemical bonding, when the bonded atoms share electrons, it is specifically called ________.
A) an ionic bond
B) a covalent bond
C) a hydrogen bond
D) a polar bond

kajumbi   333   2 Replies

kajumbi

In chemical reactions, the ________ are converted into products.

In chemical reactions, the ________ are converted into products.

In chemical reactions, the ________ are converted into products.

tyressjones   97   2 Replies

tyressjones

In chemical reactions, ________ reactions release energy and ________ reactions require an input of ...

In chemical reactions, ________ reactions release energy and ________ reactions require an input of ...

In chemical reactions, ________ reactions release energy and ________ reactions require an input of energy.

tyressjones   162   2 Replies

tyressjones

In chloroplasts, ATP synthase

In chloroplasts, ATP synthase

In chloroplasts, ATP synthase
A) catalyzes the Calvin cycle.
B) phosphorylates ADP to ATP.
C) is found in the stroma.
D) helps produce the concentration gradient of H+.

Bella_23   40   1 Reply

Jamesriverdean

In ciliates macronuclei control __________. (Multiple Choice)

In ciliates macronuclei control __________. (Multiple Choice)

In ciliates macronuclei control __________.
  a. reproduction only
  b. growth only
  c. metabolism only
  d. movement only
  e. both growth and metabolism

Question 2
[br

ornobtizzi   23   3 Replies

tyeoi

In Clackamas, Oregon, a stand of hybrid poplar trees was planted on an area of land that is ...

In Clackamas, Oregon, a stand of hybrid poplar trees was planted on an area of land that is ...

In Clackamas, Oregon, a stand of hybrid poplar trees was planted on an area of land that is contaminated with volatile organic compounds (VOCs). Why would someone purposely plant trees in an area with contaminated soil?
A) to use the trees as a means

bgoodwi1   48   1 Reply

gugu123

In clinical trials, control groups of individuals who receive a safe but noneffective treatment ...

In clinical trials, control groups of individuals who receive a safe but noneffective treatment ...

In clinical trials, control groups of individuals who receive a safe but noneffective treatment instead of the drug being studied are being given ________.
A) stem cells
B) a placebo
C) a double-blind trial
D) efficacy
E) Non

sab   101   1 Reply

Cecil

In club fungi, each club-shaped cell initially ____.

In club fungi, each club-shaped cell initially ____.

In club fungi, each club-shaped cell initially ____.
  a. is a spore
  b. is a zygote
  c. contains a single nucleus
  d. is dikaryotic
  e. undergoes mitosis to produce spores

Question

Liomustafa   33   3 Replies

Jfiscella88

In coastal areas, wind blows in from the sea during the night. (True or false?)

In coastal areas, wind blows in from the sea during the night. (True or false?)

In coastal areas, wind blows in from the sea during the night.
 
  Indicate whether the statement is true or false.

Question 2

In which of the three vertical intertidal zones is bi

Princessklo82   60   3 Replies

beunique90

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant
  over red (b), and solid color (S) is dominant over
  spotted (s). A cross of Bb Ss with bb ss will produce
  the phenotypic ratio
  a. 9:3:3:1.
  b. 1:1:1:1.
  c. 1:

avaasadi   31   3 Replies

romankn

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant
  over red (b), and solid color (S) is dominant over
  spotted (s). If two dihybrids (Bb Ss) are crossed,
  what fraction of the black, solid offspring will be
  homozygous?

ladyapj   45   2 Replies

ladyapj

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant
  over red (b), and solid color (S) is dominant over
  spotted (s). If two dihybrids (Bb Ss) are crossed, the
  most common phenotype will be
  a. black and solid.
  b. bla

JohanaT16   42   3 Replies

kkiahtherese

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant
  over red (b), and solid color (S) is dominant over
  spotted (s). If a red male is crossed with a black
  female to produce a red, spotted puppy, the
  genotypes of the parent

solaiman   56   1 Reply

hbirk8

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over
  spotted (s). If Bb Ss were crossed with Bb ss, the chance that a black, solid individual would be
  produced is
  a. 3/16.
 

Coconuts   53   1 Reply

qurat.ain46

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over
  spotted (s). In the F2 generation of a cross between BB ss with bb SS, what fraction of the offspring
  would be expected to be black

Eric8925   61   3 Replies

walravenseric

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over
  spotted (s). If two dihybrids (Bb Ss) were crossed, which would be produced?
  a. black and spotted pure-breeding forms
  b. blac

Bpittinger   63   1 Reply

longlax42

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over
  spotted (s). If two black, solid dogs were crossed several times and the total offspring were eighteen
  black, solid and five black,

Alexis23   76   1 Reply

umwut

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant ...

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over
  spotted (s). If a red male was crossed with a black female to produce a red, spotted puppy, the
  genotypes of the parents (with male

lorenlauu   49   2 Replies

lorenlauu

In colder regions, some macroalgae die off in winter, but others termed ____ live for at least 2 ...

In colder regions, some macroalgae die off in winter, but others termed ____ live for at least 2 ...

In colder regions, some macroalgae die off in winter, but others termed ____ live for at least 2 years.
 
  a. perennials
  b. annuals
  c. eurythermals
  d. stenothermals
  e. biannuals.

eriklam   36   1 Reply

nina olala

In combination, what do the products of gap genes, pair-rule genes, and segmentation polarity genes ...

In combination, what do the products of gap genes, pair-rule genes, and segmentation polarity genes ...

In combination, what do the products of gap genes, pair-rule genes, and segmentation polarity genes of fruit flies do?
A) They trigger the reorganization of the larval body into an adult body.
B) They define the segmented body plan of the e

Dugg   148   1 Reply

hayley2007

In commercial food manufacturing, what is the purpose of hydrogenation?

In commercial food manufacturing, what is the purpose of hydrogenation?

In commercial food manufacturing, what is the purpose of hydrogenation?
A) to make an unsaturated fat more saturated
B) to reduce the amount of "empty calories" in a carbohydrate
C) to convert fatty acids into amino acids

chezmoi   96   2 Replies

chezmoi

In comparing innate immunity to adaptive immunity, which of the following statements is (are) ...

In comparing innate immunity to adaptive immunity, which of the following statements is (are) ...

In comparing innate immunity to adaptive
  immunity, which of the following statements is
  (are) correct?
 
  a. Innate immunity has a response time of
  about a week; adaptive immunity has an
  immediate response time

tifoanug   50   2 Replies

tifoanug

In comparing mitosis and meiosis, which of the following statements is true?

In comparing mitosis and meiosis, which of the following statements is true?

In comparing mitosis and meiosis, which of the
  following statements is true?
  a. Meiosis I is more like mitosis than is meiosis II.
  b. Both processes result in four cells.
  c. Pairing of homologues occurs in both.
  d.

ladyapj   66   2 Replies

ladyapj

In comparing mitosis and meiosis, which of the following statements is true?

In comparing mitosis and meiosis, which of the following statements is true?

In comparing mitosis and meiosis, which of the
  following statements is true?
  a. Meiosis I is more like mitosis than is
  meiosis II.
  b. Both processes result in four cells.
  c. Pairing of homologues occurs in both.

hannah415   57   1 Reply

Lakaj

In comparing mitosis and meiosis, which of the following statements is true?

In comparing mitosis and meiosis, which of the following statements is true?

In comparing mitosis and meiosis, which of the following statements is true?
  a. Meiosis I is more like mitosis than is meiosis II.
  b. Both processes result in four cells.
  c. Synapsis occurs in both.
  d. Chromatids are prese

shanell610   58   3 Replies

mmr53

In comparing mitosis and meiosis, which statement is true?

In comparing mitosis and meiosis, which statement is true?

In comparing mitosis and meiosis, which statement is true?
  a. Meiosis I is more like mitosis than is meiosis II.
  b. Both processes result in four cells.
  c. Pairing of homologues occurs in both.
  d. Chromatids are present on

krystian   102   3 Replies

bcspears

In comparing smooth and cardiac muscle, which one of the following best describes the differences ...

In comparing smooth and cardiac muscle, which one of the following best describes the differences ...

In comparing smooth and cardiac muscle, which one of the following best describes the differences between the two muscle types?
A) Smooth muscle is voluntary, whereas cardiac is involuntary.
B) Both lack muscle filaments, but cardiac muscle has sar

mzeplin   28   2 Replies

mzeplin

In comparison of oogenesis and spermatogenesis, the correct match of process..

In comparison of oogenesis and spermatogenesis, the correct match of process..

A: oogenesis - 4 ova : spermatogenesis - 1 sperm
B: oogenesis - 1 ovum and 3 non-functional polar bodies : spermatogenesis - 4 sperm
C: oogenesis - 4 ova : spermatogenesis - 1 sperm and 2 polar bodies
D: oogenesis - 1 ovum : spermatoge

geek-it-up   2018   5 Replies

lewis

In comparison to men, women make much less ____.

In comparison to men, women make much less ____.

In comparison to men, women make much less ____.
  a. testosterone
  b. growth hormone
  c. myostatin
  d. estrogen
  e. progesterone

Question 2

Bully whippets are ab

ilan707   44   2 Replies

ilan707

In comparison to women, men make muchmore:a. testosterone. b. growth hormone. c. myostatin. ...

In comparison to women, men make muchmore:a. testosterone. b. growth hormone. c. myostatin. ...

In comparison to women, men make muchmore:a.
 
   testosterone.
  b. growth hormone.
  c. myostatin.
  d. estrogen.
  e. all of these except estrogen.

Question 2
[b

caroline12345   33   1 Reply

whatever77

In comparison with temperate regions at higher latitudes, tropical communities s

In comparison with temperate regions at higher latitudes, tropical communities s

In comparison with temperate regions at higher latitudes, tropical communities show greater species richness. Which of the following is a hypothesis that has been proposed to explain this difference?
a. Tropical regions have had more time to div

arealhero   231   3 Replies

milestone23

In competing populations of organisms, genetic variations that ______________compe tition are favore

In competing populations of organisms, genetic variations that ______________compe tition are favore

In competing populations of organisms, genetic variations that ______________competition are favored through natural selection.

 A. Increase 
 
 B. Stay the same 
 
 C. Reduce 
 
 D. Cause e

dontask   718   2 Replies

dontask

In competitive inhibition an inhibitor molecule binds an enzyme at the active site. 1.True ...

In competitive inhibition an inhibitor molecule binds an enzyme at the active site. 1.True ...

In competitive inhibition an inhibitor molecule binds an enzyme at the active site.
  1.True
  2.False

Question 2

ATP is a good energy carrier because
  1.of the presence of a 5

dixoncsk2062   42   1 Reply

kaefol

In concise terms,explain the difference between genetic drift and gene flow?

In concise terms,explain the difference between genetic drift and gene flow?

Q2: Where is the diencephalon located in the central nervous system? What relationship does the structure have to the hypotalamus and the thalamus? Briefly explain the function of these glands.

JulieA   1231   1 Reply

asilenthunter

In conifers, the time between pollination and fertilization is

In conifers, the time between pollination and fertilization is

In conifers, the time between pollination and
  fertilization is
  a. just a few hours.
  b. about a day.
  c. about a month.
  d. about six months.
  e. a year or more.

Question 2

kkoonge   39   1 Reply

oliverb1