Which kingdom is known to contain organisms that have cells with no cell walls? Animalia Protista Archaebacteria Eubacteria

Answers

Answer 1
Answer: Animalia. This is the animal kingdom, and animals do not have cell walls, only cell membranes. All other mentioned kingdoms do or might have cell walls. The lack of cell walls in animals is one of the characteristics that distinguishes which kingdom an organism belongs to.
Answer 2
Answer:

Answer:

Animilia

Explanation:


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Deep sea corals can be hundreds or thousands of years old. Please select the best answer from the choices provided T F

Answers

True because since there are not many ways for them to erode they can thrive

True because since there are not many ways for them to erode they can thrive

A complete circuit contains two parallel-connected devices and a generator for providing the electromotive force. The resistance of the first device is 12 ohms, the resistance of the second device is 4 ohms, and the voltage developed by the generator is 40 V. What is the magnitude of the current flowing through the first device? A. 10 A B. 13.32 A C. 8 A D. 3.33 A

Answers

The answer is D. 3.33 A

In parallel connected devices, circuits are also placed parallel. It is known that in parallel circuits, total voltage is equal to the voltage of each device. 

So, we know that:
Device 1 - R1 = 12 ohms
Device 2 - R2 = 4 ohms
Total voltage - V = 40V = V1 = V2

If V = I × R, for the first device is V1 = I1/R1.
⇒ I1 = V1 ÷ R1
⇒ I1 = 40 V ÷ 12 ohms
⇒ I1 = 3,33 A

Answer:

D. 3.33 A 100%

Explanation:

Which of the following conditions would cause the salinity of ocean water to decrease? A.high rates of evaporation

B.freezing of glaciers

C.extremely hot weather

D.a river flowing into the sea

Answers

The answer is D, a river flowing into the sea as this dilutes the salt water with fresh water.

The answer is D, a river flowing into the sea as this dilutes the salt water with fresh water.

This group of animals is primarily aquatic and has mandibles and two pairs of antennae. Which group is this?

Answers

Crustacea(ns) form a very large group of arthropods.

What might be some of the economic and environmental tradeoffs of producing clothes from human-made polymers, such as nylon, and polyester versus natural polymers, such as cotton?

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The price of cotton is very high, because it is a natural fiber that must be cultivated and then harvested in certain months of the year, which in itself is a disadvantage because it interrupts the continued production of textile merchandise.

The above generates a very strong economic impact, in addition the environmental impacts are what most concern since to keep this crop in good condition, the use of pesticides, fertilizers and other minerals is constantly used that greatly pollute rivers and lakes, affecting Biodiversity. Cotton is the largest consumer of water among agricultural products, which also generates a great depletion of this valuable water resource.

For the above reasons, the use of artificial polymers emerged as a more economical and environmentally friendly alternative, since sports garments are cheaper and more resistant, they can also be kept longer, they are also more resistant to wrinkles, moths and mold.

You can find more information in this link:

brainly.com/question/21491886

Answer:

Synthetic clothes are economically less expensive and lightweight compared to common traditional clothes; however, they pose difficulties for recycling

Explanation:

Polymers are compounds made of long repeating molecules, which can be classified according to their origin into natural and synthetic. Synthetic polymers include, among others, nylon (household products), polyvinyl chloride, also known as PVC (clothing), polypropylene (packaging), etc. As compared to traditional clothes made up of cotton, synthetic clothes offer significant advantages related to production costs, i.e., they can be produced in high-scale processes, and automated production is less expensive than traditional processes. However, synthetic polymers consist of long repeat chains of molecules that have very strong atomic bonds, which make difficult their degradation by decomposers (i.e., non-biodegradable in nature). The process of degradation of synthetic clothes can take up many years to break down these compounds. In addition, synthetic clothes are also pollutants because they are lost in the water when they are laundered, remaining for many years in water ecosystems.

As part of your summer research project, your professor has asked you to perform comparative genomic hybridization (CGH). He gives you DNA from one person who you know nothing about (referred to as the test subject). You use this DNA as a template to make green fluorescent DNA. You also make red fluorescent DNA with DNA from a control person. When you perform CGH, you are surprised to find that the ratio of green to red fluorescence is 2 along all of chromosome 18. You conclude:____________.A. the control person must be missing chromosome 18.B. the test subject is likely to have cancer.
C. the test subject likely has Edward Syndrome.
D. the test subject likely has Down Syndrome.

Answers

Answer: Option C

Explanation:

Edward syndrome is also called as trisomy which is a genetic disorder. This disorder is caused due to the third copy of the all the part of the chromosome number 18.

The babies that are born is small and have heart defects. They have overlapping fingers.

The ultrasound cannot detect the problem but the process of amniocentesis can confirm the syndrome.