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zysi [14]
1 year ago
10

How long ago was the Cambrian time period in the geological time scale?

Biology
1 answer:
zvonat [6]1 year ago
4 0

The answer is about 540-490 million years ago.

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Identify the genotype for this pedigree chart
AVprozaik [17]

Lets say that the genotypes are:

Male affected:XbY

Male unaffected: XaY

Female  affected: XbXb

Female carrier: XaXb

Female unaffected:XaXa

P: XbY  x  XaXa

F1: XaXb  XaXb  XaY  XaY The middle square is female carrier.

P:XbY  x  XaXb

F1: XaXb  XbXb  XaY  XbY The left square is affected female.

P:XaY  x  XbXb

F1: XaXb  XaXb  XbY  XbY The right square is affected male.


6 0
3 years ago
What kind of solution causes chloroplasts to be pushed outward against the cell wall, isotonic, hypertonic, or hypotonic?
Elina [12.6K]
The answer to this question would be hypertonic.

If the chloroplast is going to be pushed against the cell wall, probably the water around the cell wall is decreased, causing it to suck up the water inside. Then, the solution must be causing the cell to lose water. The cell will lose water if put in a hypertonic solution. In a hypertonic solution, the osmotic pressure of the solution is higher than the cell, make it attract water from cells.
7 0
3 years ago
What is the volume of a black hole?
Alex_Xolod [135]

Answer:

This value is 4*(pi)* (2Gm/c^2)^2 for nonspinning black holes, with G= Newton's constant, c= speed of light, and m= mass of the black hole. The 3-dimensional spatial volume inside a black hole, in contrast, depends explicitly on the definition of time, and can even be time dependent, or zero.

Explanation:

hope this helps

3 0
3 years ago
During gene expression, dna is transcribed into rna in the nucleus. then, the rna is translated into proteins in the cytoplasm.
antiseptic1488 [7]
The physical barrier that the mRNA must pass is the nuclear membrane. 
The process of gene expression involves two main stages; transcription ; the production of messenger RNA by the enzyme RNA polymerase, and the processing of the mRNA molecule. Then the process of translation which takes place outside the nucleus, therefore the mRNA must cross the nuclear membrane to enter the cytoplasm. 
5 0
3 years ago
Mammals like caribou that live in the arctic often use different lipid types in their legs. Legs are more susceptible to heat lo
motikmotik

1. The lipid would be more saturated. FALSE

2. The lipids on the fatty acid tails would be much shorter. TRUE

3. The membranes would contain more cholesterol. TRUE

<u>Explanation:</u>

The mammal caribou lives I the extremely cold environment of the Arctic and thus has several physiological adaptations to survive the cold. They have short ears to reduce heat loss and have two layers of fur. The lipids in caribou legs have several adaptations

When compared with saturated fatty acids unsaturated fatty acids are more fluid at low temperatures. Thus the lipids in the legs of caribou are unsaturated to maintain fluid nature at low temperatures of the Arctic. Shorter lipids on fatty acid tails remain more fluid at low temperatures when compared with the longer ones.  

Thus the lipid in the fatty acid tails will be shorter. Similarly the presence of more cholesterol in the membranes would make it more fluid in the cold conditions of the external environment. Thus the membranes would have more cholesterol.

8 0
3 years ago
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