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Anni [7]
3 years ago
10

Please help me with 2 and 3 please

Biology
2 answers:
sveta [45]3 years ago
8 0
2 is c and 3 is e
There’s your anwser
sasho [114]3 years ago
7 0

Answer:

2. A

3.D

Explanation:

2. Since the source of energy is the sun, the trophic level representing producers (plants) contains the most energy.

3. A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another. Food web is a complex network of different animals' feeding relations are aggregated.

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Water is essential for life. Its special properties make water the single most important molecule in plant life. Which of the fo
Maslowich

Answer:

Because water exhibits cohesive behavior.

Explanation:

Cohesive behavior can be explained as a behavior where molecules are attracted to each other.

And this means that,  water molecules are attracted to each  other because of their cohesive behavior. This makes them to be  attracted to other substances, such as the walls of the xylem of plants.

In this case, it is believed that the water molecules behave this  way because they are polar, that is, there is an electronegativity difference between the bonded atoms. And this enables it to move from the roots to the leaves of the plants.

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3 years ago
What makes the endoplasmic reticulum rough?​
melomori [17]

Answer:

the assembling of the protein molecules around it makes it appear rough.

Explanation:

i hope this is helping

7 0
2 years ago
Which contraceptive method is 100 percent effective at preventing pregnancy?
emmainna [20.7K]

The correct answer is D. Abstinence

Explanation:

A contraceptive method or birth control method refers to a method used to avoid pregnancy or reduce the probability of getting pregnant. From antiquity, there have been different contraceptive methods but only in the last decades, methods have been designed based on science and its effectiveness has been studied.

Because of this, nowadays there are many contraceptive methods such as pills, condom, and implants that are about 80% to 95% effective, sterilization that is a around 98% effective and natural methods that have a lower percentage of effectiveness. But the only method that has been proven as completely effective or 100% effective is abstinence because by avoiding any type of sexual intercourse it is virtually impossible an egg can be fertilized by a spermatozoid.

7 0
3 years ago
Which organelle is affected by mosaic viruses?
grigory [225]

Answer:

chloroplast .

Explanation:

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5 0
3 years ago
In peas, tall plants (T) are completely dominant over short plants (t). You cross two heterozygous pea plants Use a Punnett squa
Nikitich [7]

Answers and Explanation:

Find enclosed the Punnet square.

T= dominant allele

t= recessive allele

Tt= heterozygous genotype

TT and tt= homozygous genotype

- The male pea plant's genotype is Tt (heterozygous)

- The female pea plant's genotype is Tt (heterozygous)

- Male gametes: T and t

- Female gametes: T and t

- The expected genotypic ratio of the offpring will be:

TT: Tt: tt ⇒ 1: 2: 1

1/4 of the offpring will be TT genotype (dominant homozygous), 1/2 of the offpring will be Tt (heterozygous) genotype and 1/4 of the offpring will be tt genotype (recessive homozygous).

- The expected phenotypic ratio of the offpring will be:

tall : short ⇒ 3 : 1

3/4 of the offpring will be tall (TT and Tt) and the restant 1/4 will be short (tt).

4 0
3 years ago
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