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Serggg [28]
3 years ago
6

Which of the following is a challenge when implementing green roofs?

Biology
1 answer:
andre [41]3 years ago
3 0

Answer:

The correct option is D. Green roofs can be expensive to install.

Explanation:

There are two main disadvantages of green roofs.

Number 1: Green roofs are very expensive. Their installation takes twice the money of conventional roofs.

Number 2: The maintenance of green roofs is hard and expensive. And one might need to hire workers for it. Hence, increasing the expense again.

Apart from this, the green roofs can also cause leakage and hence have to be checked at least once every year.

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vacuoles contain/ store undigested/ waste materials

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3 years ago
True or false: male and female embryos look the same anatomically at five weeks of pregnancy.
Marizza181 [45]

The statement is true. The male and female embryos anatomically look same at five weeks of pregnancy.

In the 4th week of pregnancy the blastocysts gets implanted in the walls of uterus and develops into the placenta and then becomes an embryo. The embryo is considered starting from the point when the amniotic sac develops which is at the starting of the 5th week of pregnancy. By the 12th week of pregnancy the organs are developed such as arms and legs but the brain and spinal cord keeps developing throughout the pregnancy.

The second trimester begins at the 13th week of the pregnancy and by the 14th week the gender can be identified. So the male and female embryos are anatomically same at 5th week of the pregnancy.

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4 years ago
If a star is shown 33.11 kilometers away, how many light years would that be ?
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8 0
4 years ago
Carla is reading an article about a certain species of bacteria that can grow on the leaves of common house plants. The article
baherus [9]
<span>The bacteria are probably eubacteria because they live on common plant leaves.

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3 0
3 years ago
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3 years ago
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