Other Biology Answers

Course Phycology    

              Deadline: 19-04-2021

2. Algae are primary producers mainly in the aquatic ecosystems. Despite their numerous advantages they still do have different harmful effects, of which algal bloom is the main one caused by different species. Among those bloom-causing species, Ostreopsis is responsible for respiratory and cutaneous irritation in humans and mass mortality of marine organisms. Discuss the ecology of Ostreopsis (3pt).

3. Discuss the role of cyanobacteria (blue-green algae) for the very existence of life on the planet earth (3pt).

Course Phycology    

              Deadline: 19-04-2021

1. Lake Hawassa is one of the major freshwater bodies in Ethiopian country. It supports a lot of organisms ranging from the microalgae (phytoplankton) to different fish species. 

Phytoplankton is the primary producer; zooplankton and omnivores fish feed on, zooplankton, in turn, serves as food for carnivorous fishes at the trophic level. If Nile perch (piscivorous fish ) from Lakes Chamo and Abaya introduced to lake Hawassa, What will happen to the trophic status of the lake? (4pt)

Which region had the largest percentage of domesticate-able terrestrial herbivores or omnivores weighing more than 100 pounds?

a.              South America.

b.              Eurasia.

c.               Sub-Saharan Africa.

d.              North America.

e.              Australia.

Answer the following questions using the internet

( Answers should be typed in Microsoft Word format )

1. All lipids are HYDROPHOBIC, what does it mean?

2. What are the four main functions of Lipids? Name the four types of Lipids

3. Briefly explain the following types of fatty acids with examples (one paragraph each)

A. Saturated fatty acids

B. Monounsaturated fatty acids

C. Polyunsaturated fatty acids

D. Cis fatty acids

E. Trans fatty acids

4. What is phospholipid? Explain it's structure, functions and composition

5. Explain why does our body needs Fats? What are it's health benefits? ( minimum two paragraphs)

6. What are the various health risks of Fats? Explain how Fats causes Cardio-vascular diseases ? (minimum two paragraphs)

Effects wave and current on carbon dioxide

Effects waves and current on dissolved oxygen

The effects of waves and current on substractum

What impact will rising greenhouse gases have on climate?

How does haze in the air affect global temperatures

1.     History of Iron hypothesis.

Define the iron fertilization? How did they know about the atmospheric gas composition in ancient times? How did Martin’s come to this finding? What is the main objective of this OIC?