birds and mammals are both endothermic. i.e. they maintain body temperature internally through metabolism rather than from the environment. how would you explain this, given the position of the two groups of animals on the phylogenetic tree?

On the phylogenetic tree, (a diagram used to show relatedness among organisms) the birds and mammals are closely related to each other and they both are characterized as endothermic.

Given the position of the two group of animals on the phylogenetic tree, their similarity with regards to maintaining body temperature is due to the fact that their evolution involves a more recent ancestor compared with the other vertebrates.

As organisms evolve beginning from invertebrates through to vertebrates, the body system becomes more complex and as they evolve within the vertebrate group.

Some vertebrates like reptiles and amphibians that were  dependent on the environment to regulate their temperature while others like birds and mammals forms complex system that enable them live on land and regulate their temperature independent of the environment.

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how long can you keep hard-boiled eggs in the refrigerator

Sperm cells have a whip like ____ to move them through a liquid.

THIS IS THE PICTURE

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6)
A student observes a cell under a microscope. The cell contains chromosomes that show up inside of a nucleus surrounded by an
envelope. Based on the infon nation here, the student was able to determine whether the cell was prokaryotic or eukaryotic. After
making the distinction, the student could assume the cell came from certain cell types. From which potential organism(s) was this
cell-derived? Select ALL that apply.
A)
plant cell
B)
animal cell
fungal cell
D)
bacterial cell
E)
methanogenic Archaea cell
2

A student is researching the inheritance patterns of different traits in chickens. She hypothesizes that red feathers are dominant over black, and the trait for crests are dominant over non-crested. She performs a test cross to confirm her hypothesis. To produce the F1 generation, she crosses two parents-- a chicken that is homologous for traits showing red and crested and a chicken that is homologous for traits showing black and non-crested. Which ratio best represents the phenotype of the F2 generation


9:3:3:1


1:1:1:1


2:2:1:1


16:0

each upward movement of the basilar membrane causes the stereocilia of the inner hair cells to bend, opening __________ gates.

Determine which situation could NOT be an example of interspecific competition.
A. Two organisms competing for food.
B. Two organisms competing for a mate.
C. Two organisms competing for water.
D. Two organisms competing over territory.

The right whale is an example of
A. a species that is recovering from being endangered
B. a species that failed to adapt to changes to its environment
C. a species that is almost gone because of the excessive pollution in its habitat
D. a species that has become too populous and threatens the survival other of species
​

what is the main difference between a biome and an ecosystem

what is the thickest and longest nerve in the body

is this correct?.....​

What organelle is a twin.

Which animal has a digestive system most similar to a human?

1. cow

b. jellyfish

c. octopus

d. wolf

Which star is more massive than our Sun,but has a lower surface temperature?
(1) 40 Eridani B (3) Aldebaran
(2) Barnard's Star (4) Sirius

around the mid-1850s, mendel crossed true-breeding purple-flowered pea plants with true-breeding white-flowered pea plants. the results of his research provided us with the basic principles of heredity.

Which of the following snack foods is comprised mainly of carbohydrates?

which part of the flower or needed to make seeds?​

what is the general purpose of the light reactions of photosynthesis

What are the nerve roots that are shaped like a horse's tail and that extend down from the end of the spinal cord?

which is a type of sequence identified by gene annotation?

5. Which of the following enclose their DNA in a nucleus?

b. bacteria
c. eukaryotes
d. viruses

What is a vertebrate?
a) an animal with radial symmetry
b) an animal without a backbone
c)
an animal that is asymetrical
d) an animal with a backbone

You need to prepare for an exam on mitosis. You search for models of mitosis to help you. What kind of model should you choose?(1 point)

a model that simply lists the steps of cell cycle

a model that shows the steps of meiosis

a model that illustrates how a cell divides into two identical cells

a model that illustrates the organelles of cells

active transport moves mineral ions into root hair cells through cell membrane proteins. Explain how protein molecules move ions across a membrane during this process. (3marks)

· Water participates directly in the light reactions of photosynthesis by
a. donating electrons to NADPH.
c. accepting electrons from the electron
b. donating electrons to photosystem II. transport chains.
d. accepting electrons from ADP.

Which processes contribute to the formation of chemical sedimentary rocks?

Organisms decay in a solution.
Minerals dissolve and crystalize.
Rock fragments squeeze together.
The remains of plants and animals

what do you understand by the term reproductionwhat do you understand by the term reproduction

There are two types of reproduction, sexual and asexual Sexual reproduction involves two parents, while asexual reproduction only involves one,
Sort the reproductive processes below according to whether they are asexual or sexual.
ITEM BANK: Move to Bottom
Creation of an egg
Creation of fruit
Mushrooms producing spores
Production of seeds
Stem cuttings of plants
Sexual
Asexual
Budding in yeast
drag and drop answer here
drag and drop answer here

Which part of the mitochondrion contains the proteins that carry out oxidative phosphorylation?.

Which type of interaction is described below? ________ interactions occur between individuals of two or more different species.​