Which best describes the molecule in the diagram below

It is important to understand the differences between chemical and physical changes which process is an example of a physical ch

Bas_tet [7]

A physical change is basically a body change so like if a crayon is solid then sits in the sun for a long time it melts away that’s a physical change because it changes its physical appearance

7 0

3 years ago

Read 2 more answers

What is preserved in Burgess Shale

Lerok [7]

Answer:

The Burgess Shale of British Columbia is famous for its exceptional preservation of mid-Cambrian organisms. Around 40 other sites have been discovered of a similar age, with soft tissues preserved in a similar, though not identical, fashion.

6 0

3 years ago

How many synapses does a nervous signal have to cross when moving from an interneuron in the spinal cord to activate an effector

Lerok [7]

Answer:

Two synapses.

Explanation:

Synapse or Synaptic cleft is the space two neurons or between a neuron or target organ where the signal is carried by neurotransmitter. Nerve signal first travel through interneuron to motorneuron passing through the first synapse, then the signal will travel to effector organ from motor neuron by passing through second synapse.

7 0

3 years ago

In the lungs, oxygen diffuses into the blood and is loaded onto hemoglobin for transport. In the tissues, oxygen is unloaded fro

emmasim [6.3K]

Answer:

D. partial pressure of oxygen

Explanation:

Partial pressure refers to the force applied by an individual gas per unit area in a mixture of gases which is measured in mm of Hg. The partial pressure determines the movement of the gas molecule in the system.

In the given scenario, the oxygen transport through the blood along with other gases like carbon dioxide and other minute concentration but the gaseous exchange between the lungs and the blood, between the blood and the tissues depends on the partial pressure of the oxygen. The oxygen moves from the higher pressure to lower pressure therefore partial pressure is the determining factor.

Thus, Option-D is correct.

4 0

3 years ago

Suppose a species of bird called the red‑crested warbler has a plumage length that is controlled by a single gene. The P????mPlm

andreev551 [17]

Answer:

Check the explanation

Explanation:

North American:

112 birds total => 224 alleles

112 - 55 birds = 57 short plume birds.

$q^2$ = (2*57) / 224 = 0.5089

Freq(short plume allele) = q = 0.7134

Freq(long plume allele) = p = 1 - q = 0.2866

From this North American population we get

0.2866 * 224 = 64 long plume alleles

0.7134 * 224 = 160 short plume alleles

South American:

452 birds total => 904 alleles

452 - 75 birds = 377 short plume birds.

$q^2$ = (2*377) / 904 = 0.8341

Freq(short plume allele) = q = 0.9133

Freq(long plume allele) = p = 1 - q = 0.0867

From this South American population we get

0.0867 * 904 = 78 long plume alleles

0.9133 * 904 = 826 short plume alleles

Blended population has

64 + 78 = 142 long plume alleles

160 + 826 = 986 short plume alleles

142 + 986 = 1128 total alleles

p = 142/1128 = 0.1259

q = 986/1128 = 0.8741

All right. The new population has the p and q from the blended population. The new population has 1000 individuals. The portion of long plumed will be homozygote long plumage + heterozygote, which is $p^2$ + 2pq, and you multiply that by the population size 1000 to get the final answer.

population size * ( $p^2$ + 2pq) = 1000 * (0.1259^2 + 2*0.1259*0.8741) = 236 birds

4 0

3 years ago