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forsale [732]
4 years ago
10

Heather has to solve this system of equations using elimination. what should be her first step?

Biology
1 answer:
tino4ka555 [31]4 years ago
3 0
The answer it letter d

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The sun contains about __________ percent of the mass of the solar system.
hodyreva [135]

The sun contains about 99.9 percent of the mass of the solar system.


3 0
3 years ago
A three toed sloth travels at his top speed of 0.15 miles per hour. How far does he get in 3 hours?
lara31 [8.8K]
I think it’s 0.15x3 so .45 miles in three hours
5 0
3 years ago
Read 2 more answers
2. A certain recessive, lethal gene is carried on the X chromosome. (Lethal genes are those that result in death.) A man marries
son4ous [18]
The surviving children would be 66.7% female and 33.3% male. Of the female children, 50% would be expected to be carriers of this gene (like their mother)
| Xg | X
—————-
X | XXg | XX
—————-
Y | XgY | XY

Pretty ugly, but the best punnet square I can do without a link. The offspring with the “g” are those that carry the lethal gene. The male child that carries it will die, but since it is recessive, the female child will live but will be a carrier for this gene. I hope this helps.
8 0
3 years ago
which scientist realized that, by studying samples under a microscope, all animals are made up of cells?
zepelin [54]
Robert Hooke looked through a primitive microscope at a thinly cut piece of cork. He saw a series of walled boxes that reminded him of the tiny rooms, or cellula, occupied by monks.

All organisms are composed of one or more cells. The cell is the basic unit of structure and organization in organisms. All cells come from pre-existing cells. And Anton Van Leeuwenhoek made his version of the microscope and discovered something very odd when he looked a the gunk on his teeth.
3 0
3 years ago
A few seconds after touching the Mimosa pudica plant, its leaflets fold together. It takes about 10 minutes or more for the plan
fredd [130]

Answer:

cells suddenly become flaccid after stimulation because of the loss of K+

Explanation:

Nastic responses are non-directional movements of parts of plants in response to diffuse stimuli. The closinf of leaves of<em> </em><u><em>Mimosa</em></u><em> </em><em><u>pudica</u></em> when touched is a type of haptonastic response. These movements are brought about by turgor pressure changes of the leaf and the petal bases. At the bases, there are pressure sensitive swellings called pulvini which through loss of turgidity cause nastic movements.

According to research, cells go through an efflux of potassium (K) which leads to the reduction of turgor. Direct quote on Reed-Guy et al. (2017)'s paper "This mechanism is initiated when a stimulus causes an efflux of potassium within the leaf, creating a loss of turgor pressure, which closes the leaves and causes them to droop."

5 0
3 years ago
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