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Luba_88 [7]
3 years ago
10

Please help meh How do muscles work in pairs?

Biology
2 answers:
solniwko [45]3 years ago
7 0

Answer: Skeletal muscles only pull in one direction.

Explanation: For this reason they always come in pairs. When one muscle in a pair contracts, to bend a joint for example, its counterpart then contracts and pulls in the opposite direction to straighten the joint out again. Hope this helps! :) If not, I am sorry :( If it does, Your Welcome!

VARVARA [1.3K]3 years ago
6 0

Answer:Muscles relax and contract when one muscle pulls and moves your body part and if you want to do the opposite movement the opposite muscle contracts, allowing the first muscle to relax.

Explanation:

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Though plants, fungi, and prokaryotes all have cell walls, we place them in different taxa. Which of these observations comes cl
PtichkaEL [24]

Answer:

Due to other differences.

Explanation:

The plants, fungi, and prokaryotes all have cell walls, we place them in different taxa because of the other differences such as mobility, mode of nutrition etc. Plants and fungi are not mobile means can not move from one place to another whereas prokaryotes are mobile. Fungi and prokaryotes are heterotrophs means that feed on other organism whereas plants are autotrophs means make their own food. There is also difference in their cell wall i.e. the cell of plants is composed of cellulose, the cell wall of prokaryotes especially bacteria is composed of peptidoglycans and the cell wall of fungi is composed of chitin.

7 0
3 years ago
In the lab, you isolate a chlorella mutant that is unable to switch xanthophyll pigments into the inactive, non-heat-dissipating
REY [17]

Answer:

No, because xanthophyll dissipates absorbed light as heat, and in low light environments, such dissipation would decrease photosynthesis and therefore growth.

Explanation:

Xanthophyll is one of the accessory pigments present in organisms. Being an accessory pigment, the function of xanthophyll is to dissipate the absorbed visible light. Since it dissipates the visible light, the light cannot be used by Chlorella to drive the light-dependent reactions of photosynthesis.

When a mutant Chlorella is grown in the shady region, the dissipation of light by xanthophyll would further reduce the rate of photosynthesis. This mutation is not an adaptive feature in shady regions where the rate of photosynthesis is already lower due to limited availability of light and therefore, would not be favored by natural selection and would not spread to the future generations.

8 0
4 years ago
You are investigating a mutant eukaryotic cell line that makes all of its mRNAs much longer than the mRNAs from normal cells. In
Klio2033 [76]

Answer:

The correct answer is that the spliceosome is non-functional.

Explanation:

A spliceosome refers to a composite and large molecular apparatus found mainly inside the nucleus of the eukaryotic cells. The prime function of the spliceosome is to remove the introns from a transcribed pre-mRNA, that is, a kind of primary transcript.  

In case if the spliceosome machinery gets failed to function, the mRNA will not remove the introns, that is, the non-coding parts and retains it. This will eventually lead to the formation of longer mRNAs.  

3 0
3 years ago
Why is maple sap collected in the spring instead of the fall?
tigry1 [53]
Sap flows when daytime temperatures rise above freezing (32 degrees Fahrenheit / 0 Celsius) and nighttime temperatures fall below freezing.
The rising temperature creates pressure in the tree generating the sap flow.
8 0
3 years ago
How can liquid be drawn into a pipette safely?
pshichka [43]
By squeezing a bulb attached to the wide end of the pipette.
3 0
4 years ago
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