General Biology

All chordates have (a) _____. (Multiple Choice)

All chordates have (a) _____. (Multiple Choice)

All chordates have (a) _____.
 
  a. backbone c. notochord
  b. jaws d. both jaws and notochord

Question 2

Annelida and cephalopods have a(n) _____ circulatory system.
 

buttssss   67   3 Replies

grubbingrouch

Vertebrate jaws evolved from _____. (Multiple Choice)

Vertebrate jaws evolved from _____. (Multiple Choice)

Vertebrate jaws evolved from _____.
 
  a. gill supports c. scales
  b. ribs d. teeth

Question 2

The lancelet pharynx functions in _____.
 
  a. respiration c. repr

fokkdsn   39   1 Reply

Tkonrye

A divergence from _____ gave rise to tetrapods.

A divergence from _____ gave rise to tetrapods.

A divergence from _____ gave rise to tetrapods.
 
  a. ray-finned fishes c. cartilaginous fishes
  b. lizards d. lobe-finned fishes

Question 2

Lampreys and sharks both have __

reubank   54   2 Replies

reubank

Reptiles are adapted to life on land by _____.

Reptiles are adapted to life on land by _____.

Reptiles are adapted to life on land by _____.
 
  a. tough skin d. amniote eggs
  b. internal fertilization e. both tough skin and good kidneys
  c. good kidneys f. all of these

Question 2

qpitt19777   47   3 Replies

ustropics

Only birds have _____. (Multiple Choice)

Only birds have _____. (Multiple Choice)

Only birds have _____.
 
  a. a cloaca c. feathers
  b. a four-chambered heart d. amniote eggs

Question 2

The closest modern relatives of birds are _____.
 
  a. croco

studyperfect   47   3 Replies

noah.ratliff

Homo erectus _____. (Multiple Choice)

Homo erectus _____. (Multiple Choice)

Homo erectus _____.
 
  a. was the earliest member of the genus Homo
  b. was one of the australopiths
  c. evolved in Africa and dispersed to many regions
  d. disappeared as the result of an asteroid impact

[colo

tempuser   44   2 Replies

tempuser

Roots and shoots lengthen through activity at _____.

Roots and shoots lengthen through activity at _____.

Roots and shoots lengthen through activity at _____.
 
  a. apical meristems c. vascular cambium
  b. lateral meristems d. cork cambium

Question 2

True or false? Primates are

caroline12345   52   3 Replies

whatever77

_____ conducts water and minerals through a plant, and _____ conducts sugars.

_____ conducts water and minerals through a plant, and _____ conducts sugars.

_____ conducts water and minerals through a plant, and _____ conducts sugars.
 
  a. Phloem; xylem c. Xylem; phloem
  b. Cambium; phloem d. Xylem; cambium

Question 2

In many plan

codytheaggie   79   2 Replies

codytheaggie

Which of the following cell types are alive in mature tissue? Choose all that apply.

Which of the following cell types are alive in mature tissue? Choose all that apply.

Which of the following cell types are alive in mature tissue? Choose all that apply.
 
  a. collenchyma cells d. tracheids
  b. sieve tubes e. companion cells
  c. vessel members f. sclerenchyma cells

[fa

memoloka   47   3 Replies

vsantiago1

Xylem and phloem are _____ tissues.

Xylem and phloem are _____ tissues.

Xylem and phloem are _____ tissues.
 
  a. ground c. dermal
  b. vascular d. both vascular and dermal

Question 2

In phloem, organic compounds flow through _____.
 

Goose7701   87   1 Reply

blvan

Bark is mainly _____. (Multiple Choice)

Bark is mainly _____. (Multiple Choice)

Bark is mainly _____.
 
  a. periderm and cork c. periderm and phloem
  b. cork and wood d. cork cambium and phloem

Question 2

Tree rings occur when _____.
 
  a. there

dotyc92   71   2 Replies

dotyc92

Decomposing matter in soil is called _____.

Decomposing matter in soil is called _____.

Decomposing matter in soil is called _____.
 
  a. loam c. topsoil
  b. humus d. nutrients

Question 2

Carbon, hydrogen, and oxygen are _____ for plants.
 
  a. macr

qpitt19777   72   1 Reply

bambino131913

The nutrition of some plants depends on a mutually beneficial association between a root and a ...

The nutrition of some plants depends on a mutually beneficial association between a root and a ...

The nutrition of some plants depends on a mutually beneficial association between a root and a fungus. The association is known as a _____.
 
  a. root nodule c. root hair
  b. mycorrhiza d. root hypha

[fa]che

sneakykitti   50   2 Replies

sneakykitti

Water evaporation from plant parts is called _____.

Water evaporation from plant parts is called _____.

Water evaporation from plant parts is called _____.
 
  a. translocation c. transpiration
  b. expiration d. tension

Question 2

A vascular cylinder consists of cells of the __

kimmykgirl19   77   3 Replies

kkiahtherese

A waxy cuticle is secreted by _____.

A waxy cuticle is secreted by _____.

A waxy cuticle is secreted by _____.
 
  a. ground tissue c. a stoma
  b. epidermal cells d. root hairs

Question 2

Water transport from roots to leaves occurs mainly because o

bklynbeauty86   52   3 Replies

RhondaUnicorn

Stomata open in response to light when _____.

Stomata open in response to light when _____.

Stomata open in response to light when _____.
 
  a. guard cells pump ions into their cytoplasm
  b. guard cells pump ions out of their cytoplasm
  c. water evaporates out of guard cells

Qu

khalasar99   37   1 Reply

slayer909

Sieve tubes are part of _____.

Sieve tubes are part of _____.

Sieve tubes are part of _____.
 
  a. cortex c. phloem
  b. mesophyll d. xylem

Question 2

Tracheids are part of _____.
 
  a. cortex c. phloem
  b. mesophyll d

shanell610   53   2 Replies

shanell610

Transport of photosynthetically produced sugars from leaves to roots occurs by _____.

Transport of photosynthetically produced sugars from leaves to roots occurs by _____.

Transport of photosynthetically produced sugars from leaves to roots occurs by _____.
 
  a. pressure flow
  b. differences in source and sink solute concentrations
  c. the pumping force of xylem vessels
  d. transpiration,

Sakura   37   3 Replies

Tyrib

Name one reward that a pollinator may receive in return for a visit to a flower of a coevolved ...

Name one reward that a pollinator may receive in return for a visit to a flower of a coevolved ...

Name one reward that a pollinator may receive in return for a visit to a flower of a coevolved plant.
 
  What will be an ideal response?

Question 2

A flower's _____ has one or mor

juhuyh   52   3 Replies

jyxynvaea

Meiosis in an ovule produces _____ megaspores.

Meiosis in an ovule produces _____ megaspores.

Meiosis in an ovule produces _____ megaspores.
 
  a. two c. six
  b. four d. eight

Question 2

Meiosis of cells in pollen sacs forms haploid _____.
 
  a. megaspore

blahfuk5   67   2 Replies

blahfuk5

The seed coat forms from the _____.

The seed coat forms from the _____.

The seed coat forms from the _____.
 
  a. integuments c. endosperm
  b. coleoptile d. sepals

Question 2

Seeds are mature _____; fruits are mature _____.
 
  a. ova

mrs.anderson   67   3 Replies

ghdfharfg

Cotyledons develop as part of _____.

Cotyledons develop as part of _____.

Cotyledons develop as part of _____.
 
  a. carpels c. embryo sporophytes
  b. accessory fruits d. petioles

Question 2

A new plant forms from a stem that broke off of the parent p

shanell610   54   2 Replies

shanell610

_____ is the stimulus for phototropism.

_____ is the stimulus for phototropism.

_____ is the stimulus for phototropism.
 
  a. Red light c. Green light
  b. Far-red light d. Blue light

Question 2

Plant hormones _____.
 
  a. may have multiple e

Jkader   98   3 Replies

kamehameha2014

Solar tracking is similar to _____.

Solar tracking is similar to _____.

Solar tracking is similar to _____.
 
  a. phototropism c. photoperiodism
  b. gravitropism d. thigmotropism

Question 2

Sunlight resets biological clocks in plants by activati

qwerqwerqer   65   3 Replies

Belly313

_____ tissues are sheetlike with one free surface.

_____ tissues are sheetlike with one free surface.

_____ tissues are sheetlike with one free surface.
 
  a. Epithelial c. Nervous
  b. Connective d. Muscle

Question 2

In some plants, flowering is a _____ response.
 
 

solaiman   47   2 Replies

solaiman

Glands are derived from _____ tissue.

Glands are derived from _____ tissue.

Glands are derived from _____ tissue.
 
  a. epithelial c. muscle
  b. connective d. nervous

Question 2

_____ form a waterproof seal between cells.
 
  a. Tight junct

Ag566   50   2 Replies

Ag566

_____ is mostly plasma. (Multiple Choice)

_____ is mostly plasma. (Multiple Choice)

_____ is mostly plasma.
 
  a. Adipose tissue c. Cartilage
  b. Blood d. Bone

Question 2

Most _____ have many collagen and elastin fibers.
 
  a. epithelial tissues

Princessklo82   74   3 Replies

Ello_kara

Cells of _____ can shorten (contract).

Cells of _____ can shorten (contract).

Cells of _____ can shorten (contract).
 
  a. epithelial tissue c. muscle tissue
  b. connective tissue d. nervous tissue

Question 2

Your body converts excess carbohydrates an

pch123   70   2 Replies

pch123

______ detects and integrates information about changes and controls responses to those changes. ...

______ detects and integrates information about changes and controls responses to those changes. ...

______ detects and integrates information about changes and controls responses to those changes.
 
  a. Epithelial tissue c. Muscle tissue
  b. Connective tissue d. Nervous tissue

Question 2

Nwere   38   3 Replies

Marzard18

The heart and lungs are in the _____ cavity.

The heart and lungs are in the _____ cavity.

The heart and lungs are in the _____ cavity.
 
  a. thoracic c. cranial
  b. pelvic d. abdominal

Question 2

Skin darkens when exposed to sunlight because _____ produce more pi

kq   43   2 Replies

kq

Hair and nails are keratin-rich structures formed by _____ tissue.

Hair and nails are keratin-rich structures formed by _____ tissue.

Hair and nails are keratin-rich structures formed by _____ tissue.
 
  a. muscle c. epithelial
  b. nervous d. connective

Question 2

With negative feedback, a change induces a

Kaetlynrenae   59   2 Replies

Kaetlynrenae

When a neuron is at rest, _____.

When a neuron is at rest, _____.

When a neuron is at rest, _____.
 
  a. it is at threshold potential
  b. gated sodium channels are open
  c. it holds less sodium than the interstitial fluid
  d. both it is at threshold potential and it holds less sodium t

jina   50   3 Replies

tomg2113

Neurotransmitters are released by _____. (Multiple Choice)

Neurotransmitters are released by _____. (Multiple Choice)

Neurotransmitters are released by _____.
 
  a. axon terminals c. dendrites
  b. the cell body d. the myelin sheath

Question 2

Action potentials occur when _____.
 
  a

Eminoa   71   1 Reply

berrytarts

Skeletal muscles are controlled by _____.

Skeletal muscles are controlled by _____.

Skeletal muscles are controlled by _____.
 
  a. sympathetic signals
  b. parasympathetic signals
  c. somatic nerves
  d. both sympatheic signals and parasympathetic signals

Question

ilan707   27   1 Reply

Vickyhung

Skeletal muscles contract in response to _____.

Skeletal muscles contract in response to _____.

Skeletal muscles contract in response to _____.
 
  a. acetylcholine (ACh) c. serotonin
  b. dopamine d. endorphins

Question 2

When you sit quietly on the couch and read, outp

Bishopoutlaw   48   2 Replies

Bishopoutlaw

Morphine mimics natural pain killers called _____. (Fill in the blank)

Morphine mimics natural pain killers called _____. (Fill in the blank)

Morphine mimics natural pain killers called _____.
 
  Fill in the blank(s) with correct word

Question 2

The cerebrum is part of the _____.
 
  a. forebrain c. hindbrain

Rnaprh   42   3 Replies

Vickyhung

Myelinated axons make up the _____ matter of the brain and spinal cord. (Fill in the blank)

Myelinated axons make up the _____ matter of the brain and spinal cord. (Fill in the blank)

Myelinated axons make up the _____ matter of the brain and spinal cord.
 
  Fill in the blank(s) with correct word

Question 2

Parkinson's disease involves low levels of _____.
 

malaka33   22   3 Replies

npandelos1

_____ is defined as a decrease in the response to an ongoing stimulus.

_____ is defined as a decrease in the response to an ongoing stimulus.

_____ is defined as a decrease in the response to an ongoing stimulus.
 
  a. Perception c. Sensory adaptation
  b. Visual accommodation d. Somatic sensation

Question 2

The pa

bector215   41   2 Replies

bector215

Chemoreceptors play a role in the sense of _____.

Chemoreceptors play a role in the sense of _____.

Chemoreceptors play a role in the sense of _____.
 
  a. taste d. hearing
  b. smell e. both tast and smell
  c. touch f. all of these

Question 2

Which is a somatic sensa

rylee19   39   3 Replies

ajx47

Mechanoreceptors in the _____ send signals to the brain about the body's position relative to ...

Mechanoreceptors in the _____ send signals to the brain about the body's position relative to ...

Mechanoreceptors in the _____ send signals to the brain about the body's position relative to ravity.
 
  a. eye c. tounge
  b. ear d. nose

Question 2

In the _____, neurons are

riiiiooottt   44   3 Replies

Nax101