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Alexandra [31]
4 years ago
15

Please help me number 21 need ASAP ....

Biology
1 answer:
allochka39001 [22]4 years ago
3 0

Answer:

Adenine, Guanine, Cytosine, and Uracil.

Explanation:

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Answer Under 20-30 minutes and I give a brainiest!!
Nataliya [291]

Answer:

They quickly become fatigued.

Explanation:

1. They use peristalsis to move substances through tubes - True

2. They form structures like blood vessels and the small intestine - True

3. They quickly become fatigued - False

4. They are connected by gap junctions - True

Hope this helped :)

3 0
2 years ago
Read 2 more answers
Why do so many people believe there is a link between autism and the measles, mumps, and rubella vaccine?
alexandr1967 [171]
The measles, mumps and the rubella vaccine [MMR] is usually given to children twice before the age of 7.  The first dose is given between age 12 to 15 months while the second dose is given between the ages of 4 and 6. Many people link the MMR vaccines to autism because of a scientific publication that was published in 1989. The research study reported a link between autism and MMR vaccination. This publication has been discredited.
Also, the period of during which the first dose of the vaccination is usually given coincides with the time when parents usually notice developmental abnormalities in their children.
3 0
4 years ago
30 POINTS
Igoryamba
Abstract

Nature was and still is a prolific source of inspiration in pharmacy, cosmetics, and agro-food industries for the discovery of bioactive products. Informatics is now present in most human activities. Research in natural products is no exception. In silico tools may help in numerous cases when studying natural substances: in pharmacognosy, to store and structure the large and increasing number of data, and to facilitate or accelerate the analysis of natural products in regards to traditional uses of natural resources; in drug discovery, to rationally design libraries for screening natural compound mimetics and identification of biological activities for natural products. Here we review different aspects of in silico approaches applied to the research and development of bioactive substances and give examples of using nature-inspiring power and ultimately valorize biodiversity.


3 0
4 years ago
Read 2 more answers
Which statements correctly describe mutations in gametes and mutations in somatic cells?
ASHA 777 [7]

A mutation is a rare, accidental or induced modification of genetic information (DNA or RNA sequence) in the genome.


The consequences of a mutation vary according to the part of the genome affected. A mutation is said to be hereditary if the mutated genetic sequence is passed on to the next generation.

In multicellular animals, germline mutations can be transmitted to offspring, whereas somatic mutations do.


Somatic mutations do not affect cells intended for reproduction, so they are never hereditary:

* Post-zygotic mutations are the mutations that appear in the egg after fertilization. They are rarer and are expressed as mosaic in the individual concerned (the mutation will be present only in the daughter cells originating from the mutated embryonic cell).

* Mutations can appear throughout life on the DNA of any cell; they are then transmitted to the line of the daughter cells. These can, in some cases, become tumor cells and then form cancer.

7 0
3 years ago
Which of the following types of mass movement occur along a curved surface
Maru [420]
<span>There are different types of mass movements. They are: 1. rockfall--free falling of rocks or debris of rocks from a steep cliff. 2. mudflow--commonly known as mud slides. This is another form of slope movement a proportion of clay and debris rapidly flow. 3.landslip/landslide--is a mass movement that involves a great range of ground movements. This can happen under water,at the coast or even on shore. 4. slump--happens along a curved surface over a short distance.5. soil creep--also known as downhill creep. This is a slow progression of rocks downward. Therefore, the answer to this question is "slump".</span>
7 0
3 years ago
Read 2 more answers
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