BIOL1006 Lecture Notes - Lecture 21: Sporophyte, Meiosis, Gametophyte

24 views7 pages

coralporpoise173

9 Jun 2018

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Lecture 21: how to build a plant

Land plants

Major group of land plants living today

- Plants are multicellular photosynthetic organisms adapted to living on land

- Their closest living relatives are green algae

Sexual life cycle of plants

- Life cycles of all sexually reproducing organisms show a pattern known

as alternation of generations

- Alternation between diploid (2n) and haploid (n) stage

- Both diploid and haploid stages are multicellular in plants

find more resources at oneclass.com

Unlock document

This preview shows pages 1-2 of the document.
Unlock all 7 pages and 3 million more documents.

Already have an account? Log in

Important terms

Fertilization- fusion of two gametes

Meiosis- a reductional division that halves the

number of chromosomes in a diploid cell

Spore- the haploid cell produced by meiosis

Sporophyte- a multicellular diploid organism that

produces spores

Gametophyte- a multicellular haploid organism

that contains gametes

Non-vascular plants

Non-vascular plants: liverworts, hornworts, mosses

find more resources at oneclass.com

Unlock document

This preview shows pages 1-2 of the document.
Unlock all 7 pages and 3 million more documents.

Already have an account? Log in

Document Summary

Plants are multicellular photosynthetic organisms adapted to living on land. Their closest living relatives are green algae. Life cycles of all sexually reproducing organisms show a pattern known as alternation of generations. Alternation between diploid (2n) and haploid (n) stage. Both diploid and haploid stages are multicellular in plants. Meiosis- a reductional division that halves the number of chromosomes in a diploid cell. Sporophyte- a multicellular diploid organism that produces spores. Gametophyte- a multicellular haploid organism that contains gametes. Characterised by the presence of the conducting tissues xylem and phloem. Seed plants are characterised by ovules and pollen. A: an ovule includes the developing female megagametophyte surrounded by protective integuments. B: pollen grains are the male microgametophyte (in which sperm develop) C: in confiders, a pollen grain has 2 bladder-like wings for transport into ovule. Enclosure of the female gametophyte within an ovule. Ovule becomes the seed after fertilisation, containing the embryo.

Related Questions

1) What is the event that marks the transition from haploid to the diploid stage of the life cycle and what event marks the transition back to the haploid stage again. Describe the timing of these two cellular even in life cycles that are dominated by haploid cells, dominated by diploid cells or that have alternation of generations.

2) What are the closest relatives of land plants? How do you know this? What do these relatives tell us about the ancestors of green plants -- where did they live? How big were they?

3) Why was it the green algae that gave rise to land plants -- why donât we have relatives of red or brown algae living on land?

blackcod740

Question 1

The process by which RNA is synthesized using DNA as a template is â¦

Select one:

a. replication

b. transcription

c. translation

d. inspiration

Question 2

Which of the following occurs during meiosis but not mitosis?

Select one:

a. DNA condenses into chromosomes

b. nuclear envelop disappears

c. homologous chromosomes separate

d. sister chromatids separate

Question 3

Which part of the animal life cycle is haploid?

Select one:

a. gamete

b. zygote

c. sporophyte

d. spore

Question 4

Single celled eukaryotic organisms are â¦

Select one:

a. viruses

b. bacterial

c. archaea

d. protists

Question 5

Which type of cellular division results in the formation of diploid cells from a diploid parent cell?

Select one:

a. mitosis

b. meiosis

c. interphase

d. A and B but not C

e. all of the above

Question 6

A sequence of DNA that codes for a single protein is a â¦

Select one:

a. gene

b. ribosome

c. mRNA

d. none of the above

Question 7

Which of the following is characteristic of animals?

Select one:

a. heterotrophic

b. sexual reproduction

c. embryonic development

d. all of the above

Question 8

All genes have only two possible alleles.

Select one:

True

False

Question 9

The presence of membrane-bound organelles is characteristic of â¦

Select one:

a. prokaryotes

b. viruses

c. bacteria

d. eukaryotes

Question 10

What are the building blocks of proteins?

Select one:

a. fatty acids

b. amino acids

c. nucleic acids

d. all of the above

Question 11

During which phase of the cell cycle does DNA replication occur?

Select one:

a. Mitosis

b. Interphase

c. Meiosis

d. Replicosis

Question 12

Which of the following characteristic is shared among fungi and animals?

Select one:

a. autotrophic

b. heterotrophic

c. cell walls

d. absorb nutrients

Question 13

A error in DNA replication that goes unrepaired is a â¦

Select one:

a. chromosome

b. chromatid

c. mutation

d. none of the above

Question 14

Alternate forms of a gene are called ________.

Select one:

a. chromatids

b. chromosomes

c. ribosomal subunits

d. alleles

Question 15

The physical expression of a genotype is the phenotype.

Select one:

True

False

Question 16

In complete dominance, a heterozygous genotype results in â¦

Select one:

a. a recessive phenotype

b. a dominant phenotype

c. a third and unique phenotype

d. none of the above

Question 17

Which theory explains the evolution of eukaryotes from prokaryotes?

Select one:

a. phagocytosis

b. endosymbiosis

c. pinocytosis

d. none of the above

Question 18

Which scientist experimented with plants to describe patterns of inheritance?

Select one:

a. Mendel

b. Chase

c. Einstein

d. Watson

Question 19

Which cellular organelle contains aerobic cellular respiration?

Select one:

a. chloroplasts

b. mitochondria

c. nucleus

d. lysosome

Question 20

Which of the following statements is false?

Select one:

a. Haploid gametes are formed by meiosis

b. Mitosis forms genetically identical daughter cells

c. Mitosis results in the formation of four daughter cells from a single parent cell

d. Mitosis forms diploid daughter cells from a diploid parent cell

Question 21

The first forms of life on Earth were ________.

Select one:

a. plants

b. microorganisms

c. birds

d. dinosaurs

Question 22

Which of the following is used to separate chromosomes during nuclear division?

Select one:

a. cytoskeleton

b. microtubules

c. actin and myosin

d. amoeboid movement

e. all of the above

Question 23

Which generation is most dominant in more primitive plants?

Select one:

a. bryophyte

b. sporophyte

c. gametophyte

d. androphyte

Question 24

Which of the following is characteristic of plants?

Select one:

a. autotrophic

b. contain chloroplasts

c. multicellular

d. all of the above

Question 25

During which phase of mitosis do chromosome line up along the middle of the cell?

Select one:

a. prophase

b. metaphase

c. anaphase

d. telophase

Question 26

During which phase of mitosis does DNA condense into distinct chromosomes?

Select one:

a. prophase

b. metaphase

c. anaphase

d. telophase

Question 27

The process by which DNA is used as a template to make new DNA is â¦

Select one:

a. translation

b. replication

c. transcription

d. allocation

Question 28

Which of the following is characteristic of plant but not animal cells?

Select one:

a. chloroplasts

b. water vacuole

c. cell wall

d. all of the above

Question 29

Which meiotic division is most like mitosis?

Select one:

a. Meiosis I

b. Meiosis II

c. Meiosis III

d. Meiosis IV

Question 30

Which enzyme catalyzes replication?

Select one:

a. DNA polymerase

b. RNA polymerase

c. Ribosome

d. all of the above

BIOL1006 Lecture Notes - Lecture 21: Sporophyte, Meiosis, Gametophyte

Document Summary

Get access

Related Documents

BIOL1006 Lecture Notes - Lecture 21: Endosperm, Zygote, Mitosis

BIOL1006 Lecture Notes - Lecture 23: Secondary Growth, Water Balance, Vascular Cambium

BIOL 1108 Lecture Notes - Lecture 16: Conifer Cone, Polytrichum Commune, Gametophyte

Related Questions