Echinoderms have
A. a five-part body
B. an internal skeleton
C. tube feet
D. all of the above
Animals of Earth

do women or men have it harder? why?

I need to submit this ASAP please help

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

Mutations in genes cause

A. Variation
B. Competition
C. Reproduction

The process of cellular respiration takes place mostly in the _______.
A.
lysosomes
B.
nucleus
C.
mitochondria
D.
endoplasmic reticulum

S-waves arrive at a seismic station?

First
Second
Third
Fourth

Which of the following is NOT true about groundwater pollution?

A) It is most dangerous because water flows for many miles.

B) Groundwater is often contaminated when people dump toxins into wells.

C)The main source of groundwater is rain and snow.

D) A toxic substance from a closed factory can affect the groundwater for years.

PLEASE HELP :) Will give brainliest

Assume that producers in an ecosystem have 1,000,000 kilocalories of energy. How much energy is available to primary
consumers?
5. Which trophic level has the greatest biomass?

Cuticular scale patterns in human head hairs tend to be very regular.
Group of answer choices

True

False

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

Explain negative feedback mechanism

The
sperm
is the male sex cell.

The
egg
is the female sex cell.

A
forms as a result of fertilization.

Vaccine: What is one advantage of being vaccinated against a particular virus?
I

Which of the following is considered a eukaryotic cell?

infections may be caused by
A. mutations
B. microorganisms
C. toxic substances
D. climate changes

We know that a mutated gene, which is dominant, is responsible for the disease osteogenesis imperfecta type II. Let the letter D represent the osteogenesis imperfecta type II gene, and d represent the normal gene.

Which of the following genotypes correctly describes a female who is has the disease, but is heterozygous for it?

A. XXDd
B. XXdd
C. XYDd
D. XXDD
E. XYDD

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

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.

What did Mendel's cross-pollination of pea plants prove?


A. Inheritance of certain factors is dependent upon the genetic code.


B. Certain factors are dominant, and other factors are recessive.


C. All the cells in an organism carry the same hereditary factors.


D. Crossing a tall plant with a tall plant will always result in a tall plant.

Which of these is not an environmental effect of building dams?
A. increased water temperature
B. soil erosion upstream
C. weed growth downstream
D. reduced fertility downstream
Please help!!! Am taking unit test!! Should give 23 points!

What will happen if a baseball and a bat had an elastic collision like a golf and club

will mark brainliest

Which process(es) increases genetic diversity in a population?
Question 8 options:

a)

Natural selection

b)

Asexual reproduction

c)

Mutation & Sexual Reproduction

d)

Genetic drift

I WILL GIVE BRAINLIEST
Sally 
Sally thinks that the plants get food from the soil and that plants use their roots to take in the food they need for energy. She is worried that her plant will use up the soil in the Microworld and will run out what it needs for food.

Tanya
Tanya thinks that plants make their own food using air, water, and light. She thinks that as long as her Microworld is in the sun, the plant will have what it needs for food.


Richard  
Richard also thinks that plants make their own food using air, water, and light. However, he is worried that there is not enough water or air in the bottle for his plant and that the plant will run out of what it needs to make food before the end of the project.

Which student’s claim do you most agree with? Explain your evidence and reasoning?.

Which student’s claim do you least agree with? Explain your evidence and reasoning.

How does soil quality affect the characteristics of ecosystems?

Which of the following best describes the impact of the Declaration of
Independence?
a) It established the U.S. Government by dividing power between an executive,
legislative, and judicial branches.
b) It made the colonies' split with England official by formally proclaiming the United
States to be a free nation.
c) It has been used by many totalitarian governments to put down rebellions
worldwide
d) It revolutionized political thought by rejecting the ideas of the Enlightenment as it
established a body of laws for the new United States.

An energy harvesting process is depicted above. On which branch of the tree of life would organisms be able to perform this process? ​

A)On all branches of the tree, as glycolysis is a universal, energy-releasing process for cells. B)Only on the branch with Eukarya, as eukaryotes are the only organisms that contain mitochondria. C)Only on the branch with Archaea, as extremophiles are the only organisms that evolved the ability to process pyruvate. D)Only on the branch with Bacteria, as prokaryotes are the only organisms that contain enzymes necessary to perform this process

what are the long strands of DNA called?

A.Chromosomes
B.Fossils
C.Genes
D.Mutations

Biology 1
Formative Assessment #10
SC 912L 15.8
10. Early Earth was an extremely hot violent place of volcanic eruptions, collisions with
objects from space and deadly gasses. This was not a place for living organisms. Not til
the Earth began to cool did the possibility of life emerge. Which of the following was the
most likely trigger for life on Earth?
4. direct sunlight
B appearance of water
C. decrease in methane gas
D. increased carbon dioxide

What geographic feature has the largest impact on creating a climate zone

Which idea originated with Charles Darwin?
A. Organisms have undergone changes during Earth’s history.
B. Traits acquired during a lifetime are passed to offspring.
C. Living organisms have not changed since they were created.
D. Species evolve by natural selection.