Why didn’t Darwin think you could observe natural selection in a lifetime?

Answer:

There aren't enough generations visible within a lifetime to have any visible changes or evidence of natural selection. Essentially, evolution takes much longer than 1 lifespan to happen.

Which of the following improves your range of motion and helps prevent
injuries?
A. A healthy body composition.
B. Strong flexibility,
C. Strong cardio-respiratory endurance.
D. A good sense of balance.
SUBMIT

Choose words of phrases from the list to complete the sentences
Each word or phrases may be used once, more than once or not at all

carbon dioxide
nitrogen
anaerobic respiration
amino acids
aerobic respiration
lungs
liver
fats
kidneys
toxic

Excretion is defined as the removal of material and the waste products of metabolism.
Carbon dioxide is formed in humans during the process of .
Urea is produced in the and is excreted in the .
Urea is formed from that the body does not need.​

What is stored energy?

10. An automobile headlight has a resistance of 40 ohms when attached to a standard 12 volt battery. How much current flows through the headlight?

Please help !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

1. Define los siguientes pares de conceptos a partir de su semejanzas y diferencias A. ADN – ARN B. Acido Nucleico – Nucleótido C. Aminoácido – Proteína

*
Which example is NOT an outcome of the ecosystem modifying a phenotype?
A.the changing of the color of an animal's fur as the temperature changes
B.the increased intelligence of a person who attended school for many years
C.the pink-flowered snapdragons that result from crosses between red-flowered and
white-flowered snapdragon plants
D.the very short stature of a kind of tree that grows at a high altitude in comparison with
the same kind of tree growing at a lower altitude

Form a hypothesis that explains your choice. You will be able to revise your hypothesis after performing experiments.

Which of the following cannot reliably prevent the impact of hurricanes on hurricane-prone places?

A)

restoring freshwater marshes

B)

allowing the growth of a natural buffer of trees

C)

completely preventing settlements in areas that seem prone to catastrophes

D)

encouraging people to avoid settling in areas known to be hazardous

E)

using satellite images to predict hurricanes

How does the stomach protect itself from being digested by its own gastric juices?
a]it secretes mucin that coats the lining
b]the pancreas adds insulin to the stomach
c]it squeezes gastric juices only in the middle
d]the liver sends bile to the stomach

Which of the following describes positive feedback?
Select one:

A. A loss of output from the body’s receptors.

B. The response of the body to increased temperatures.

C. An event that reduces the effects of a stimulus.

D. An event that enhances the original stimulus.

What type of microscopy would you use to study the detailed internal structure of a mitochondria? A.Light microscopy B.Scanning Electron Microscopy C.Transmission Electron Microscopy D.Electron microscopy

How to write 778,00,000 in scientific notation

What type of mutation is the example below?

Original DNA: T T T G G G A C T A T C C A T A T C

Mutated DNA: T T T A G C C T A G G G A C T A T C C A T A T C

A: point mutation
B: Frameshift Mutation
C: deletion
D: Insertion
E: Inversion

In the jar shown, a sample of various sediment was mixed with water and then mixed with water and then allowed to settle for 24 hours. The jar served as a model for what process

What is comparative anatomy and how do scientists use it to study evolution?

Which of the vulture's five senses is most unusual and why?

A sea anemone has tentacles (similar to jellyfish) that deliver a chemical sting to animals that come in direct contact with them. Clownfish, however, are immune to the sea anemone's sting. They live among the tentacles of sea anemones and rely on the anemones for protection.

Sea anemones are filter feeders, and the movement of the clownfish increases the current of water flowing through the anemone. In addition, clownfish tend to drop scraps of food as they feed. What type of relationship exists between the clownfish and the sea anemone?
A. parasitism
B. predation
C. mutualism
D. commensalism

Answer the following. The first to answer corectly and provide relevent evedence will
be potentaly be given a heart, five stars, and branleist. the querstions are;

___________________ is the study of heredity.

An organism that has a __________ gene pair will always have two genes for a particular trait.

The _________________________ is a chart used to predict the traits for the offspring from a cross.

a characteristic that is not passed from one generation to the next in the genes but instead is acquired during the lifetime of an individual is called what.

A gene in a gene pair that is always expressed

The science of heredity; the study of how traits are passed from parent(s) to offspring

When both genes from a homologous pair are identical

Factors in the environment of an organism that limit the full expression of a gene

When both genes from a homologous pair are different

Two similar chromosomes; one from the mother and one from the father

The links that hold the two sides of the DNA molecule together

A murder occurs in a nursing home during a night full of thunderstorms and pouring rain. The victim is discovered lying on the plush carpet of the rec room, bleeding from a wound to the head. The staff assures investigators that there must have been a break-in because no one who lived or worked at the facility would do something like that. Considering the Principles of Trace Evidence, what would investigators be looking for to prove that someone entered from outside the facility?

Muddy or wet footprints in the carpet
The discovery of a murder weapon
Letters to the victim from a sick relative
Blood spatter from the victim's head wound

8. Which of the following shows an example of extinction?

A: Two species of caterpillars compete for the same food
B: Two species of caterpillars breed to create a new species
C: A generation of caterpillars all metamorphosize into butterflies
D: An entire species of caterpillar dies off

// Please help !!!!!!!!!!

How can you prevent oxygen toxicity?

how does the body's organization enable it to function

What phyla is this animal?





Platyhelminthes

Nematoda

Annelida

Cnidarian

A cell has undergone determination to become an epithelial lung cell. If it is transplanted to a leg muscle, what do you think will happen to this cell?

What process happens farther up the river to bring the sediments to the delta?
A.
volcanic eruptions
B.
erosion
C.
earthquakes
D.
friction

In a genetic cross between plants, the alleles are denoted as P and p, where P is purple flowers and p stands for white flowers, which one is considered the dominant allele for flower color?

Having dimples (D) is dominant over not having dimples (d). If a person that is Dd has children with a person that is dd, what would be their children’s possible genotypes?

a
DD, Dd
b
Dd, dd
c
dd, DD
d
Dd, DD, dd

Select the true statements about mitosis and meiosis
Mitosis creates haploid cells
Mitosis creates cells with a complete set of genetic instructions
Meiosis create diploid cels
Meiosis creates cells with a complete set of genetic instructions
o Meiosis creates haploid cells
Mitosis creates diploid cells