algae

Question 1

What type of organisms are algae?

Answer 1

Chlorophyll-bearing, autotrophic organisms with a thalloid body.

Question 2

What type of organisms are algae?

Answer 2

Chlorophyll-bearing, autotrophic organisms with a thalloid body.

Question 3

Are algae aquatic or terrestrial?

Answer 3

Almost all algae are aquatic.

Question 4

Do algae possess vascular tissue?

Answer 4

No, multicellular algae lack vascular tissue and show little tissue differentiation.

Question 5

What is the characteristic body type of algae?

Answer 5

Thalloid, meaning it is not differentiated into root, stem, and leaf.

Question 6

How do algae reproduce?

Answer 6

Vegetatively, asexually by spores, or sexually by the union of gametes.

Question 7

Are the sex organs of algae unicellular or multicellular?

Answer 7

Generally unicellular, but they can also be multicellular, with all cells fertile.

Question 8

Do algae sex organs have a protective jacket?

Answer 8

In most cases, the structure lacks a protective jacket.

Question 9

How does the zygote of algae develop?

Answer 9

It develops by mitosis or meiosis, without forming an embryo.

Question 10

Do algae exhibit alternation of generations?

Answer 10

Yes, they have distinct alternation of generations.

Question 11

Are the gametophyte and sporophyte generations of algae independent?

Answer 11

Yes, when present, both generations are independent.

Question 12

Can algae be prokaryotic or eukaryotic?

Answer 12

They can be either prokaryotic or eukaryotic.

Question 13

What type of chlorophyll do algae possess?

Answer 13

Algae are chlorophyll-bearing organisms.

Algae primarily possess chlorophyll a, which is the main pigment involved in photosynthesis.

In addition, different groups of algae may have accessory pigments and other types of chlorophyll:

Chlorophyll b: Found in green algae (Chlorophyta).

Chlorophyll c: Present in brown algae (Phaeophyta) and diatoms.

Chlorophyll d: Found in some red algae (Rhodophyta).

Chlorophyll e: Found in some rare golden algae.

These variations in chlorophyll types and accessory pigments help algae adapt to different light conditions in aquatic environments.

Question 14

Do multicellular algae exhibit tissue differentiation?

Answer 14

Multicellular complex thalli exhibit little tissue differentiation.

Question 15

What kind of environments are most suitable for algae?

Answer 15

Aquatic environments.

Question 16

What defines the autotrophic nature of algae?

Answer 16

Their ability to produce food through photosynthesis.

Question 17

Are algae considered plants?

Answer 17

They are plant-like but differ as their body is thalloid and lacks vascular tissue.

Question 18

How are the gametes in algae typically united?

Answer 18

Through sexual reproduction by gamete fusion.

Question 19

What is the primary mode of algae reproduction?

Answer 19

Vegetative, asexual (spores), or sexual reproduction.

Question 20

Do algae undergo embryonic development?

Answer 20

No, algae do not form embryos during development.

Question 21

Reproductive Strategies:

Answer 21

the zygote develops directly (by mitosis or meiosis) without forming an embryo is significant, as it differentiates algae from embryophytes (land plants).

Question 22

Diversity

Answer 22

The diversity in cellular organization (prokaryotic and eukaryotic) is a unique aspect of algae that links them to both simple and complex life forms.

Question 23

Alternation of Generations:

Answer 23

The independence of both the gametophyte and sporophyte generations is crucial, as it showcases the evolutionary adaptability of algae.

Question 24

Structure of Multicellular Algae:

Answer 24

multicellular algae can grow into complex structures but lack protective tissues or specialized vascular systems. This makes them distinct from higher plants.

Question 25

Fertility of Multicellular Sex Organs:

Answer 25

It’s important that all cells in the multicellular sex organs of algae are fertile, which is not typical for higher plants where only specific cells are fertile.

Question 26

What are prokaryotic algae?

Answer 26

Prokaryotic algae lack internal membrane-bound structures such as the endoplasmic reticulum (ER), Golgi bodies, and mitochondria.

Question 27

Do prokaryotic algae have a nucleus?

Answer 27

No, they lack an organized nucleus.

Question 28

What type of ribosomes are found in prokaryotic algae?

Answer 28

Prokaryotic algae have 70S ribosomes.

Question 29

Do prokaryotic algae have chromatophores?

Answer 29

No, chromatophores are absent in prokaryotic algae.

Question 30

What surrounds the plasma membrane in eukaryotic algae?

Answer 30

A cell wall surrounds the plasma membrane.