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sergeinik [125]
2 years ago
12

Which statement best describes echolocation in bats?

Biology
2 answers:
JulijaS [17]2 years ago
7 0
Sound waves reflecting off of objects
ankoles [38]2 years ago
4 0
Hey there :)

The definition of echolocation is given in the picture I have attached:

Through its definition, we can see that echolocation helps bats not to fly into barriers / obstacles / blocks and find their nourishment / food

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The interaction between DNA and histone proteins (forming nucleosomes) plays a key role in the regulation of gene expression in
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Answer:

A. The chromatin near cis-regulatory sequences will be more closed and there will be less transcription.

Explanation:

In the presence of histones, the cis-regulatory sequences of DNA like promoter, enhancers etc. are not exposed. The function of the histone acetyltransferases (HATS) is to cause chromosome decondensation i.e. removal of histones from the DNA so that transcription of the DNA could occur. Histone acetyltransferases (HATS) cause acetylation of lysine amino acid of the histone proteins. Acetyl group is negatively charged so the acetylation of histone proteins leads to the removal of their positive charge which ultimately leads to the decrease in the interaction between N terminal of histones and negatively charged phosphate group of the DNA molecule. As soon as histones are removed from the DNA where cis-regulatory sequences are located, the DNA becomes accessible for transcription.

But here a drug has been added which blocks the activity of histone acetyltransferases (HATS) in cancer cells. So it is quite evident that in these cells, histones will not get removed from the cis-regulatory sequences of DNA so the DNA will be more closer or tightly packed as a result of which  less transcription will occur.

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3 years ago
Although fats are an important component of a healthy diet, overconsumption of some types of fats may cause heart disease. Which
love history [14]
B unsaturated fats like olive oil and pine nuts are the healthy fats
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3 years ago
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____ _____ is ONE TYPE of habitat destruction. This means we’re not completely destroying habitat, but we’re breaking it up into
mafiozo [28]

Answer:

B. Habitat

Explanation:

Habitat destruction is the process by which natural habitat is damaged or destroyed to such an extent that it no longer is capable of supporting the species and ecological communities that naturally occur there. It often results in the extinction of species and, as a result, the loss of biodiversity.

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3 years ago
Part 1 - Pick one abiotic factor and change it dramatically. (Example: remove it completely or increase it A lot)
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1. Water is abioitic and is needed by every living organism Soil is abioitic and is needed by plants Trees and other plants release water vapor from their leaves (a process called transpiration) that create humidity (which in turn influences how much rain falls in an area) The climate in an area influences the special adaptations that plants and animals have. For example: warm fur coats and thick layers of fat to keep warm in cold climates, animals in dry, hot climates (desert) have large ears to release heat and cool down. Biotic factors also influence abiotic factors. Animals produce waste (go to the bathroom) which in turn will become nutrients in the soil.
2. decrease heat will affect biotic factors, like animals, warmth.

Hope this helped :)
7 0
3 years ago
If the sequence of bases on one half of a DNA molecule is GATTACA, what is the sequence of bases on the opposite side (from left
AURORKA [14]
The sequence of bases on the other half of the DNA molecule would be CTAATGT from left to right, because each cytosine base pairs with a corresponding guanine base, and each adenine base pairs with a corresponding thymine base. 
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2 years ago
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