1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
andre [41]
3 years ago
9

A human embryo doesn't need the kind of yolk that is present in a chick embryo. Explain.

Biology
2 answers:
beks73 [17]3 years ago
8 0
The yolk of an egg is the food and nutrient source for the chick as it grows, humans do not need this because they get all of the nutrients they need for development from the mother through the umbilical cord. 
Vladimir [108]3 years ago
6 0

Answer:

The egg yolk of a chicken corresponds to the female's oocyte II, which would become a chick if fertilized by a male gamete. The yolk have the nutrients that provide the energy for embryo development. In the case of humans and other animals called eutheries or placentals, embryos are fed through an organ called placenta, which connects the embryonic organism with mother's organism. Thus, there is no need for a type of "yolk" to provide the embryo with energy, as is the case with chickens and other animal species in which embryonic development occurs without direct attachment to the maternal organism.

You might be interested in
After decades of studying extraterrestrial organisms on Triton, you and your colleagues have developed a pretty good cladogram (
Nutka1998 [239]

Answer:

The effect might be due to the gene expression.

Explanation:

The effect might be due to the variation in the gene expression in the organism. In this way, the variety of the genetic pool is likely to result in a diversity of the gene pool or genome. Because of the mutation and the environmental factors, there is likely to be a slight variation of the species. This results in a slight difference in the phenotypic expression.

5 0
3 years ago
The term receptor refers to a(n) ________.
Mars2501 [29]

Answer:

a sense organ

Explanation:

this is because sense organs are part of nervous system

8 0
2 years ago
Read 2 more answers
which statement BEST describes an individual enzyme? A. it lowers the activation energy of a reaction and affects many different
irina [24]
I say C. <span>it lowers the activation energy of a reaction in affects only very specific reactions. Correct me if I'm wrong tho...thank you ;)</span>
6 0
3 years ago
PLEASEE HELPPP!!!!
dusya [7]

Answer:

<em>The correct option is B) Freshwater snails and small fish</em>

Explanation:

As we can see from the food web, the fresh water snails and the small fishes both feed on algae and water plants as their source of food hence, both these organisms feed on the same food.

Other options, like option C, is not correct because water boatman and water plants do not feed on the same sources. Water boatman feeds on reeds whereas water plants do not. Water plants will make their own food.

8 0
3 years ago
One characteristic of living things is that they____
inn [45]
One characteristic of living things is that they grow and develop.
<span>
All living things go through different stages of life and develop.

I hope this helps!</span>
3 0
3 years ago
Other questions:
  • What effect do you expect the structural differences between prokaryotes and eukaryotes to have on their function?
    15·1 answer
  • A geologist sees this folded rock when studying in the field. He is drawn to the sample that is labeled A. He determines this fo
    10·2 answers
  • Describe the vegetation: What are 3-5 common plant types found in this area (usually types of trees)? It is important to remembe
    7·1 answer
  • Butane burns as shown in the balanced chemical equation 2C4H10 + 1302 -&gt; 1OH2O + 8CO2. If 6 mol of butane burn, ____ mol of c
    7·1 answer
  • Stem cells can form many kinds of cells. In contrast, most body cells cannot form different types of cells. For example, skin ce
    8·1 answer
  • Explain how nucleotide stop molecules created fragments of replicated dna of different lengths
    14·1 answer
  • MAX POINTS AND BRAINLIEST PLEASE
    7·2 answers
  • If 60 seconds are in a minute, 60 minutes in an hour, and 24 hours in a day, then 86,400 seconds are in a day. What type of reas
    11·2 answers
  • Which of the following plant propagation methods requires sterile conditions?
    14·1 answer
  • A group of scientists has recently created a strawberry with a new mutation. This mutation causes the strawberry plant to produc
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!