Homework Answers
4. Option E. The cell division from zygote to embryo consist of cleavage and blastosis
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QUESTION 4 Cell division of a fertilized egg (zygote) to form a multicelluar embryo is called:...
QUESTION 3 Mass extinction is: a. a time during the Cambrian period (542-488 million years ago)...
QUESTION 3 Mass extinction is: a. a time during the Cambrian period (542-488 million years ago) when most of the animal phyla in existence today evolved. b. the loss of species during the Ediacaran Period. a geological period (630-542 million years ago) when the oldest definite multicellular organisms with tissues evolved. d. a geologic period (850-630 million years ago) characterized by a very cold global climate. e. an event that wipes out the majority of species within a relatively short...
Examine the frog models 2-5 which represent the 2-cell, 4-cell,.. morula stages. During cleavage, the large...
Examine the frog models 2-5 which represent the 2-cell, 4-cell,.. morula stages. During cleavage, the large zygote (fertilized egg), a single cell, divides (by mitosis) into two cells (2-cell stage); these two cells divide again yielding four (4-cell stage); these four cells divide again yielding eight (8-cell stage); and so on. After dividing a number of times, the embryo is a solid ball of cells, the morula. Just like in the starfish, a cavity (the blastocoel) then becomes visible in...
2. Describe the first cell division in Dicot development (i.e., from a one-celled zygote to a...
2. Describe the first cell division in Dicot development (i.e., from a one-celled zygote to a two- veloping embryo). How do the two products of this cell division look? What are the two cells called and which parts of the embryo do their daughter cells give rise to?
Developmental Biology 1. The of the amphibian embryo is the “organizer”. is localized to the dorsal...
Developmental Biology
1. The of the amphibian embryo is the “organizer”. is localized to the dorsal region of the amphibian and fish embryo and is a transcription factor that helps define that region. 3. In amphibians the pattern of cleavage is - 4. In fish the pattern of cleavage is 5. In amphibians the cortical cytoplasm of a newly fertilized egg rotates about 30° resulting in the appearance of a visible zone (in many species) between the animal and vegetal...
In mammalian embryos such as the mouse, the fertilized egg divides three times to form eight...
In mammalian embryos such as the mouse, the fertilized egg divides three times to form eight loosely packed cells, which become tightly adherent in a process called compaction. In the late 1970s, several laboratories made antibodies against mouse cell surface proteins. The antibodies prevented compaction, as did removal of Ca2+ from the medium. What sort of protein do the antibodies probably recognize and why?
4. The mean incubation time for a type of fertilized egg kept at a certain temperature...
4. The mean incubation time for a type of fertilized egg kept at a certain temperature is 22 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 1 day. Complete parts (a) through (e) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) Draw a normal model that describes egg incubation times of these fertilized eggs. Choose the correct...
о му е Question Help Cours The mean incubation time for a type of fertilized egg...
о му е Question Help Cours The mean incubation time for a type of fertilized egg kept at a certain temperature is 23 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 2 days. Complete parts (a) through (e) below. Assig (b) Find and interpret the probability that a randomly selected fertilized egg hatches in less than 21 days. Stude The probability that a randomly selected fertilized egg hatches in less than 21 days...
please help D) Egg A was fertilized internally and egg WUJU In which part of a...
please help
D) Egg A was fertilized internally and egg WUJU In which part of a flower do both meiosis and fertilization occur? D) petal A) ovule C) anther B) stigma During the normal meiotic division of a diploid cell, the change in chromosome number that is represented by A) nn B) 4n-n C) 2n--n D) 2n-4 For the Riven phrase, choose the term that is best described by that phrase. the entire process of growth and maturation following birth...
D Question 45 2 pts Which of the following is a characteristic of all angiosperms? o...
D Question 45 2 pts Which of the following is a characteristic of all angiosperms? o complete reliance on wind as the pollinating agent O ovules that are not contained within ovaries carpels that contain microsporangia O double internal fertilization O free-living gametophytes Angiosperm double fertilization is so-called because it features the formation of two embryos from two sperm cells and two eggs. one embryo involving one sperm cell and an endosperm involving a second sperm cell. O one embryo...
QUESTION 1 Animal as diverse as flatworms and human share all of the following traits except...
QUESTION 1 Animal as diverse as flatworms and human share all of the following traits except a. coelom b.mesoderm c. ectoderm d. endoderm e zygote cleavage QUESTION 2 A deuterostome is: d. all of theses answers are correct an organism with a blastopore that develops into the anus, with the second opening developing into the mouth. animal with a body cavity completely lined with mesodermal tissue an organism with a blastopore that develops into the mouth of protostomes, with the...
QUESTION 3 Mass extinction is: a. a time during the Cambrian period (542-488 million years ago) when most of the animal phyla in existence today evolved. b. the loss of species during the Ediacaran Period. a geological period (630-542 million years ago) when the oldest definite multicellular organisms with tissues evolved. d. a geologic period (850-630 million years ago) characterized by a very cold global climate. e. an event that wipes out the majority of species within a relatively short...
Examine the frog models 2-5 which represent the 2-cell, 4-cell,.. morula stages. During cleavage, the large zygote (fertilized egg), a single cell, divides (by mitosis) into two cells (2-cell stage); these two cells divide again yielding four (4-cell stage); these four cells divide again yielding eight (8-cell stage); and so on. After dividing a number of times, the embryo is a solid ball of cells, the morula. Just like in the starfish, a cavity (the blastocoel) then becomes visible in...
2. Describe the first cell division in Dicot development (i.e., from a one-celled zygote to a two- veloping embryo). How do the two products of this cell division look? What are the two cells called and which parts of the embryo do their daughter cells give rise to?
Developmental Biology
1. The of the amphibian embryo is the “organizer”. is localized to the dorsal region of the amphibian and fish embryo and is a transcription factor that helps define that region. 3. In amphibians the pattern of cleavage is - 4. In fish the pattern of cleavage is 5. In amphibians the cortical cytoplasm of a newly fertilized egg rotates about 30° resulting in the appearance of a visible zone (in many species) between the animal and vegetal...
4. The mean incubation time for a type of fertilized egg kept at a certain temperature is 22 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 1 day. Complete parts (a) through (e) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) Draw a normal model that describes egg incubation times of these fertilized eggs. Choose the correct...
о му е Question Help Cours The mean incubation time for a type of fertilized egg kept at a certain temperature is 23 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 2 days. Complete parts (a) through (e) below. Assig (b) Find and interpret the probability that a randomly selected fertilized egg hatches in less than 21 days. Stude The probability that a randomly selected fertilized egg hatches in less than 21 days...
please help
D) Egg A was fertilized internally and egg WUJU In which part of a flower do both meiosis and fertilization occur? D) petal A) ovule C) anther B) stigma During the normal meiotic division of a diploid cell, the change in chromosome number that is represented by A) nn B) 4n-n C) 2n--n D) 2n-4 For the Riven phrase, choose the term that is best described by that phrase. the entire process of growth and maturation following birth...
D Question 45 2 pts Which of the following is a characteristic of all angiosperms? o complete reliance on wind as the pollinating agent O ovules that are not contained within ovaries carpels that contain microsporangia O double internal fertilization O free-living gametophytes Angiosperm double fertilization is so-called because it features the formation of two embryos from two sperm cells and two eggs. one embryo involving one sperm cell and an endosperm involving a second sperm cell. O one embryo...
QUESTION 1 Animal as diverse as flatworms and human share all of the following traits except a. coelom b.mesoderm c. ectoderm d. endoderm e zygote cleavage QUESTION 2 A deuterostome is: d. all of theses answers are correct an organism with a blastopore that develops into the anus, with the second opening developing into the mouth. animal with a body cavity completely lined with mesodermal tissue an organism with a blastopore that develops into the mouth of protostomes, with the...
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