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yaroslaw [1]
3 years ago
10

How do simple organisms exchange substances?

Biology
1 answer:
LekaFEV [45]3 years ago
7 0
The answer is D. Through specialized gas exchange systems.
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Describe two ways that the carbohydrates are used in the ecosystem. (5 points
Nikolay [14]
Carbohydrates are made from the process of photosynthesis by green plants by use on energy from sunlight. They have various functions in the ecosystem by plants an animals. The two main function of carbohydrates are; carbohydrates as a source of energy for cellular activities. They are reserves and stored in form of starch in plants and inform of glycogen in animals. They also act as structural components in both plants and animals such as cellulose which is a components of plant cells.
5 0
3 years ago
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Which of the following best describes the purpose of examining mammary secretions in mares before parturition?
Arisa [49]

The statement that best describes he purpose of examining mammary secretions in mares before parturition is testing for elevated levels of calcium.

<h3>What is the processes of parturition in mares?</h3>

In parturition, a fetus is fully developed, a process called Ferguson reflex occurs to stimulate contractions. The canal is lubricated by a fluid called allanotic fluid and facilitates the discharge of the amnion and the fetus. A virginal distension releases oxytocin and more contractions.

For a mare to be ready for parturition, elevated levels of calcium is tested from the mammary gland to confirm that the mare is healthy and ready for parturition.

Learn more on parturition here: brainly.com/question/14982881

#SPJ1

3 0
1 year ago
How could you determine what percentage of a strawberry's mass is dna?
katrin [286]
First  you  determine  the   total mass  of  the   strawberries used
Then  determine  the    mass  of  the   DNA  obtained  from  the  strawberries
percentage  mass  is  therefore  equal  to  mass  of  the  DNA  obtained  divided  by  total  mass  strawberries  multipy  by   a  100


5 0
3 years ago
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Explain how modern classification is different from linnaeus methods, and why scientists changed it
SCORPION-xisa [38]

The answer is that the criteria of classification change with the improved understanding of organisms around us. During the time of Aristotle, not much was known about the living organisms. So, he classified them as he observed. Plants were classified into herbs, shrubs and trees; very much like what’s taught to a second grade student. Animals as Enaima and Anaima based on the presence or absence of RBCs. After him, Carolus Linnaeus tried his hand over classification. He came up with the 2 kingdom classification: Plants and Animals. He considered only a set of morphological and physiological criteria to decide the kingdom to which an organism belongs. It includes presence of cell wall, mode of nutrition, contractile vacuole, locomotion and others. Based on these criteria, he included widely differing organisms into a single kingdom, for example, fungi, bacteria, algae, and higher plants were included into plant kingdom just because they have cell wall as a common aspect. Then came, Ernst Haeckel, who came with a third kingdom of Protista to include unicellular organisms. Copeland gave a 4 kingdom classification segregating unicellular organisms into 2 separate kingdoms based on their nuclear structure. R.H. Whittaker came next introducing the most accepted 5 kingdom classification system. You should understand one thing that man’s knowledge of classifying organisms improved with the improving technologies available to him, which he exploited to very effective extent. Carl Woese gave the 6 kingdom classification and 3 domain system based on the 16S rRNA sequence.

Our understanding of organisms around us is improving day by day and the system of classification will also change further in pace with the improvement in technology.

I hope this helps! :D]

~ Kana ^^

8 0
3 years ago
In the twentieth century, where did the most ecologically destructive oil spill in the U.S. occur?
grin007 [14]
Your answer is Prince William Sound

Gradpoint? Novanet?

Insta: 6abiface
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