BIOLOGY COLLEGE

Just need the answer
Just need the answer - 1

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Answer 1
Answer:

Answer:

which ones

Explanation:

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Nicolaus Copernicus revolutionized astronomy by:discovering the first planet proposing that the sun revolves around the earth stating that the sun is the center of the solar system tracking the movement of the planets and stars
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In the DNA isolation process, cells are mixed with sodium chloride (i.e. NaCl) because the sodium (Na ) neutralizes the negative charge of DNA.a. Trueb. False
Describe the animals and vegetation that you see in the different climate zones.

4. What is population density?​

Answers

Answer:

The amount of living organisms in a set area, usually humans. Like the maps that show purple is no people red is lots of people.

Answer:

Population density is the number of individuals per unit geographic area, for example, number per square meter, per hectare, or per square kilometer.

Explanation:

Hope this helps my dude.

7. did NOT contribute to the mass extinction that ended the Paleozoic era.A. A meteorite impact
B. Widespread ice sheets
C. The formation of Pangaea

Answers

Answer:

C

Explanation:

The endocrine glandsa. transmit information from the sensory organs to the brain.
b. secrete hormones directly into the bloodstream.
c. are instrumental in producing myelin, which protects the neurons.
d. secrete neurotransmitters into the brain.

Answers

Answer:

B.secrete hormones directly into the bloodstream

there are at least 2 million species on earth, and species have been naturally evolving and going extinct for billions of years (in fact, over 99% of all species that ever existed are now extinct!). given these facts, why do we care if human activity is driving other species extinct as we grow?

Answers

Answer:

This is because humans are causing species to go extinct at a faster rate than the normal rate.

Explanation:

It is documented that there are at least 2 million species on earth, and species have been naturally evolving and going extinct for billions of years. Some may say even if nothing is done there would still be extinction of this species which is true.

We care if human activity is driving other species extinct as we grow because humans are causing species to go extinct at a faster rate than the normal rate.

How is it possible to find thenumber of heterozygotes in a
sample population, given the
allele frequencies?

Answers

To find the number of heterozygotes in a sample population, we need to know the allele frequencies and the total number of individuals in the population. The formula used to calculate the expected number of heterozygotes in a population is based on the Hardy-Weinberg equilibrium principle.

The Hardy-Weinberg equation is given as:

p² + 2pq + q² = 1

Where:

p = frequency of one (dominant) allele

q = frequency of the other allele (recessive) allele

p² = expected frequency of homozygous dominant individuals

2pq = expected frequency of heterozygous individuals

q² = expected frequency of homozygous recessive individuals

To find the number of heterozygotes, we can multiply the expected frequency of heterozygotes (2pq) by the total population size. This will give us an estimate of the number of individuals in the population who are heterozygous for the specific gene of interest.

Learn more about Hardy-Weinberg equation in:

brainly.com/question/29776155

#SPJ2

Explanation:

The frequency of heterozygous individuals. Answer: The frequency of heterozygous individuals is equal to 2pq. In this case, 2pq equals 0.32, which means that the frequency of individuals heterozygous for this gene is equal to 32% (i.e. 2 (0.8)(0.2) = 0.32

Which statement best describes the role of the nucleus in a cell?The gate at a factory keeps out unwanted cars.
The elevator at a factory moves materials around the building.
The boss at a factory gives out orders and directions.
The boxes at a factory are used to ship materials to customers.
O

Answers

Answer:

The boss at a factory gives out orders and directions.

Explanation:

The nucleus is an organelle that is enclosed by nuclear membrane and carry genetic material in eukaryotic cells.

The role of nucleus is to monitor and control the functioning of different activities such as growth and metabolism of the cell and also transfers the hereditary information. Likewise boss of a factory gives out orders and directions to regulate the factory properly.

Hence, the correct option is "The boss at a factory gives out orders and directions."
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The secretion of hormones by the pituitary gland is an example of _______________.autocrine signalingparacrine signalingendocrine signalingdirect signaling across gap junctions