Given the following phylogenetic tree, which evolutionary event occurred most recently?

A.) development of different forms of symmetry.

B.) development of tissues.

C.) each of these traits evolved at the same time.

D.) protostome and deuterostome development.

Answer:

Option-D

Explanation:

A phylogenetic tree is a diagrammatic representation which is constructed in to show the common ancestors at the base of the tree and the branches represent the new species.

The phylogenetic tree which is constructed based on the traits evolved during evolution is known as a cladogram. In the given question, the cladogram represents the evolution of various groups of the organism from a common ancestor based on the traits evolved.

The trait which was evolved earlier is present at the base like the development of tissues while the most common trait is present at the top which is the development of deuterostome and protostome.

Thus, Option-D is the correct answer.

How do limiting factors impact local ecosystems?



A)Limiting Factors prevent populations in ecosystems form growing any larger. If any of the limiting factors change, animal and plant populations change, too.


B)Limiting factors do not prevent populations in ecosystems from growing any larger. If any of the limiting factors change, animal and plant populations do not change, too.


C)Limiting factors can never impact ecosystems.


D)As biodiversity of an ecosystem increases, the ability to withstand environmental stress due to the loss of a single species or group also increases, improving the sustainability of the ecosystem.

The blood disorder in which the blood doesn't clot properly is known as-


Hemophilia


Erythemia


Color blindness

Why we should be concerned about the increase in amount of the green house gases in the atmosphere?

B vitamins and vitamin C are water soluble vitamins.
O A.
True
B.
False

Which of the following are the major "reservoirs" of carbon in the environment?
Select one or more:
A. the Sun
B. natural habitats
C. the Earth's interior
D. the atmosphere
E. sediments
E the oceans
G. the human body

Physical characteristics include 3 pairs of legs and 3 body sections *
arachnids
insects
annelids
echinoderms

What two things make blood pressure? *

A. pressure caused by contraction of heart ventricle and pressure exerted on blood by
walls of blood vessels

B. pressure caused by contraction of heart atrium and pressure exerted on blood by walls of blood vessels

C. pressure caused by stressful workload and pressure exerted by teachers

D. pressure caused by contraction of heart ventricle and pressure due to gravity

What climate conditions occurs during el ninio

Line t passes through (4, 5) and is perpendicular to the line shown on the coordinate grid.

a coordinate plane with a line passing through two points at 0 comma 3 and 7 comma 2

What is the equation of line t in standard form?

x − 7y = −161
7x − y = 23
−7x − y = 23
x + 7y = 161

Arctic ice retreat is threatening many species in this ecosystem. Their resources are being cut and they are needing to find new ways to survive. Do you think in your lifetime you will see drastic effects to the species in this ecosystem and why? Will that affect other ecosystems?

Helppp !
Mendel published his results in 1865, but the significance of his work was not
recognized at that time. What is one reason scientists were not excited about
Mendel's work at the time?
O
A. He did not have enough data.
O
B. His results were false.
O
C. He did not repeat his experiments.
O
D. His results conflicted with accepted theories.

I need to submit this ASAP please help

State reason(s) why ash should or should not be used in making compost

Predict how a loss of function mutation in the p53 gene is most likely to affect the cell cycle in response to DNA damage. Justify your predictions.

nervous/endocrine questions help pls!!

What organ receives oxygen First during each circulatory cycle

The mechanism through which a parents gene is turned off, through the attachment of a methyl group to that parent's DNA is called :

A) methylation

B) mutation analysis.

C) cross contamination.

D) spermatogenesis or oogenesis.

(HELP) A region periodically experiences ample rainfall and ideal temperatures. If the
population also experiences little disease at that time, the region is most
likely to have a(n) ___.
a. decreasing food supply
b. decreasing population
c. increasing popularity
d. increasing carrying capacity

Label the following chemical equations as either photosynthesis or cellular respiration.
a. 6CO2 + 6H,0 → C6H12O6 + 60,
b. C6H12O6 + 60, + 6CO2 + 6H20

1. Water is the only substance that exists in nature as a solid, liquid, and gas
at Earth's

A cell phone discarded in the United States can cause a person processing it in China, India, or Africa to suffer negative consequences if it is not handled properly.

True Or False

explain how the products of photosynthesis are stored leaves!​

What is the pathway of air into the body?

A. nose → nasal cavity → pharynx → trachea → larynx → bronchi → lungs
B. nose → nasal cavity → pharynx → larynx → trachea → lungs → bronchi
C. nose → nasal cavity → larynx → pharynx → trachea → bronchi → lungs
D. nose → nasal cavity → pharynx → larynx → trachea → bronchi → lungs

Which ones goes with organ,organ system, and tissue

What are the different possible gametes for AABBDd?

Why should extra precautions against sun exposure be taken when boating?

Water cancels out most sunscreens.
UV rays are blocked over land, but not over water.
The heat of the water increases potential skin damage.
The water reflects UV rays, adding to exposure.

Pheumonia is caused by_

when would you need to summarize and article

Father
B b
Mother
B
b
BB
Bb
Bb
bb
B=dominant
b = recessive
The gene for brown hair (B) in Goats
Consider the possible genotypes of the offspring of two heterozygous brown goats. The ratio of brown to white
offspring in this case would be
A)
1:3.
B)
2:2
3:1
D)
3:4

How do the cells and organs of the Skeletal and Muscular system work together?

A newborn child was brought to the hospital nursery before he was marked with his parents' names. The hospital workers must use what they know
about genetic outcomes to determine whom the child belongs to. They use his traits to help them. The baby has freckles (F dominant), and attached
earlobes (I recessive). They believe that the baby most likely belongs to a couple in which the man has attached earlobes but no freckles. It is known that
the woman is heterozygous for freckles and earlobe type.
Complete the Punnett square below to determine the probability that the child belongs to this couple. List the possible combinations of the father's
alleles across the top and the possible combinations of the mother's alleles down the left side. Then write your answer in the space below. Include a
brief statement explaining how you reached your answer.